\n\n| 1<\/td>\n | 0.01745240643728351<\/td>\n<\/tr>\n |
\n| 2<\/td>\n | 0.03489949670250097<\/td>\n<\/tr>\n |
\n| 3<\/td>\n | 0.05233595624294383<\/td>\n<\/tr>\n |
\n| 4<\/td>\n | 0.0697564737441253<\/td>\n<\/tr>\n |
\n| 5<\/td>\n | 0.08715574274765816<\/td>\n<\/tr>\n |
\n| 6<\/td>\n | 0.10452846326765346<\/td>\n<\/tr>\n |
\n| 7<\/td>\n | 0.12186934340514747<\/td>\n<\/tr>\n |
\n| 8<\/td>\n | 0.13917310096006544<\/td>\n<\/tr>\n |
\n| 9<\/td>\n | 0.15643446504023087<\/td>\n<\/tr>\n |
\n| 10<\/td>\n | 0.17364817766693033<\/td>\n<\/tr>\n |
\n| 11<\/td>\n | 0.1908089953765448<\/td>\n<\/tr>\n |
\n| 12<\/td>\n | 0.20791169081775931<\/td>\n<\/tr>\n |
\n| 13<\/td>\n | 0.22495105434386497<\/td>\n<\/tr>\n |
\n| 14<\/td>\n | 0.24192189559966773<\/td>\n<\/tr>\n |
\n| 15<\/td>\n | 0.25881904510252074<\/td>\n<\/tr>\n |
\n| 16<\/td>\n | 0.27563735581699916<\/td>\n<\/tr>\n |
\n| 17<\/td>\n | 0.2923717047227367<\/td>\n<\/tr>\n |
\n| 18<\/td>\n | 0.3090169943749474<\/td>\n<\/tr>\n |
\n| 19<\/td>\n | 0.3255681544571567<\/td>\n<\/tr>\n |
\n| 20<\/td>\n | 0.3420201433256687<\/td>\n<\/tr>\n |
\n| 21<\/td>\n | 0.35836794954530027<\/td>\n<\/tr>\n |
\n| 22<\/td>\n | 0.374606593415912<\/td>\n<\/tr>\n |
\n| 23<\/td>\n | 0.3907311284892737<\/td>\n<\/tr>\n |
\n| 24<\/td>\n | 0.40673664307580015<\/td>\n<\/tr>\n |
\n| 25<\/td>\n | 0.42261826174069944<\/td>\n<\/tr>\n |
\n| 26<\/td>\n | 0.4383711467890774<\/td>\n<\/tr>\n |
\n| 27<\/td>\n | 0.45399049973954675<\/td>\n<\/tr>\n |
\n| 28<\/td>\n | 0.4694715627858908<\/td>\n<\/tr>\n |
\n| 29<\/td>\n | 0.48480962024633706<\/td>\n<\/tr>\n |
\n| 30<\/td>\n | 0.49999999999999994<\/td>\n<\/tr>\n |
\n| 31<\/td>\n | 0.5150380749100542<\/td>\n<\/tr>\n |
\n| 32<\/td>\n | 0.5299192642332049<\/td>\n<\/tr>\n |
\n| 33<\/td>\n | 0.544639035015027<\/td>\n<\/tr>\n |
\n| 34<\/td>\n | 0.5591929034707468<\/td>\n<\/tr>\n |
\n| 35<\/td>\n | 0.573576436351046<\/td>\n<\/tr>\n |
\n| 36<\/td>\n | 0.5877852522924731<\/td>\n<\/tr>\n |
\n| 37<\/td>\n | 0.6018150231520483<\/td>\n<\/tr>\n |
\n| 38<\/td>\n | 0.6156614753256583<\/td>\n<\/tr>\n |
\n| 39<\/td>\n | 0.6293203910498375<\/td>\n<\/tr>\n |
\n| 40<\/td>\n | 0.6427876096865392<\/td>\n<\/tr>\n |
\n| 41<\/td>\n | 0.6560590289905073<\/td>\n<\/tr>\n |
\n| 42<\/td>\n | 0.6691306063588582<\/td>\n<\/tr>\n |
\n| 43<\/td>\n | 0.6819983600624985<\/td>\n<\/tr>\n |
\n| 44<\/td>\n | 0.6946583704589972<\/td>\n<\/tr>\n |
\n| 45<\/td>\n | 0.7071067811865475<\/td>\n<\/tr>\n |
\n| 46<\/td>\n | 0.7193398003386511<\/td>\n<\/tr>\n |
\n| 47<\/td>\n | 0.7313537016191705<\/td>\n<\/tr>\n |
\n| 48<\/td>\n | 0.7431448254773941<\/td>\n<\/tr>\n |
\n| 49<\/td>\n | 0.7547095802227719<\/td>\n<\/tr>\n |
\n| 50<\/td>\n | 0.766044443118978<\/td>\n<\/tr>\n |
\n| 51<\/td>\n | 0.7771459614569708<\/td>\n<\/tr>\n |
\n| 52<\/td>\n | 0.7880107536067219<\/td>\n<\/tr>\n |
\n| 53<\/td>\n | 0.7986355100472928<\/td>\n<\/tr>\n |
\n| 54<\/td>\n | 0.8090169943749474<\/td>\n<\/tr>\n |
\n| 55<\/td>\n | 0.8191520442889918<\/td>\n<\/tr>\n |
\n| 56<\/td>\n | 0.8290375725550417<\/td>\n<\/tr>\n |
\n| 57<\/td>\n | 0.8386705679454239<\/td>\n<\/tr>\n |
\n| 58<\/td>\n | 0.848048096156426<\/td>\n<\/tr>\n |
\n| 59<\/td>\n | 0.8571673007021122<\/td>\n<\/tr>\n |
\n| 60<\/td>\n | 0.8660254037844386<\/td>\n<\/tr>\n |
\n| 61<\/td>\n | 0.8746197071393957<\/td>\n<\/tr>\n |
\n| 62<\/td>\n | 0.8829475928589269<\/td>\n<\/tr>\n |
\n| 63<\/td>\n | 0.8910065241883678<\/td>\n<\/tr>\n |
\n| 64<\/td>\n | 0.898794046299167<\/td>\n<\/tr>\n |
\n| 65<\/td>\n | 0.9063077870366499<\/td>\n<\/tr>\n |
\n| 66<\/td>\n | 0.9135454576426009<\/td>\n<\/tr>\n |
\n| 67<\/td>\n | 0.9205048534524404<\/td>\n<\/tr>\n |
\n| 68<\/td>\n | 0.9271838545667873<\/td>\n<\/tr>\n |
\n| 69<\/td>\n | 0.9335804264972017<\/td>\n<\/tr>\n |
\n| 70<\/td>\n | 0.9396926207859083<\/td>\n<\/tr>\n |
\n| 71<\/td>\n | 0.9455185755993167<\/td>\n<\/tr>\n |
\n| 72<\/td>\n | 0.9510565162951535<\/td>\n<\/tr>\n |
\n| 73<\/td>\n | 0.9563047559630354<\/td>\n<\/tr>\n |
\n| 74<\/td>\n | 0.9612616959383189<\/td>\n<\/tr>\n |
\n| 75<\/td>\n | 0.9659258262890683<\/td>\n<\/tr>\n |
\n| 76<\/td>\n | 0.9702957262759965<\/td>\n<\/tr>\n |
\n| 77<\/td>\n | 0.9743700647852352<\/td>\n<\/tr>\n |
\n| 78<\/td>\n | 0.9781476007338057<\/td>\n<\/tr>\n |
\n| 79<\/td>\n | 0.981627183447664<\/td>\n<\/tr>\n |
\n| 80<\/td>\n | 0.984807753012208<\/td>\n<\/tr>\n |
\n| 81<\/td>\n | 0.9876883405951378<\/td>\n<\/tr>\n |
\n| 82<\/td>\n | 0.9902680687415704<\/td>\n<\/tr>\n |
\n| 83<\/td>\n | 0.992546151641322<\/td>\n<\/tr>\n |
\n| 84<\/td>\n | 0.9945218953682733<\/td>\n<\/tr>\n |
\n| 85<\/td>\n | 0.9961946980917455<\/td>\n<\/tr>\n |
\n| 86<\/td>\n | 0.9975640502598242<\/td>\n<\/tr>\n |
\n| 87<\/td>\n | 0.9986295347545738<\/td>\n<\/tr>\n |
\n| 88<\/td>\n | 0.9993908270190958<\/td>\n<\/tr>\n |
\n| 89<\/td>\n | 0.9998476951563913<\/td>\n<\/tr>\n |
\n| 90<\/td>\n | 1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n C\u00e1c gi\u00e1 tr\u1ecb n\u00e0y \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c th\u01b0 vi\u1ec7n to\u00e1n h\u1ecdc ti\u00eau chu\u1ea9n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c. V\u00ed d\u1ee5, sin(30\u00b0) \u2248 0,5, l\u00fd t\u01b0\u1edfng cho c\u00e1c ph\u00e9p t\u00ednh tam gi\u00e1c 30-60-90 trong thi\u1ebft k\u1ebf b\u00e1nh r\u0103ng.<\/p>\n B\u1ea3ng h\u00e0m Cosin<\/h2>\nCosin l\u00e0 t\u1ec9 s\u1ed1 gi\u1eefa c\u1ea1nh k\u1ec1 v\u00e0 c\u1ea1nh huy\u1ec1n, gi\u1ea3m t\u1eeb 1 \u1edf 0\u00b0 xu\u1ed1ng 0 \u1edf 90\u00b0. N\u00f3 r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c t\u00ednh to\u00e1n th\u00e0nh ph\u1ea7n ngang c\u1ee7a vect\u01a1 l\u1ef1c ho\u1eb7c chuy\u1ec3n \u0111\u1ed9ng n\u00e9m trong c\u00e1c h\u1ec7 th\u1ed1ng c\u01a1 h\u1ecdc.<\/p>\n \n \n\n\n| G\u00f3c (\u00b0)<\/th>\n | Gi\u00e1 tr\u1ecb cos<\/th>\n<\/tr>\n<\/thead>\n | \n\n| 1<\/td>\n | 0.9998476951563913<\/td>\n<\/tr>\n | \n| 2<\/td>\n | 0.9993908270190958<\/td>\n<\/tr>\n | \n| 3<\/td>\n | 0.9986295347545738<\/td>\n<\/tr>\n | \n| 4<\/td>\n | 0.9975640502598242<\/td>\n<\/tr>\n | \n| 5<\/td>\n | 0.9961946980917455<\/td>\n<\/tr>\n | \n| 6<\/td>\n | 0.9945218953682733<\/td>\n<\/tr>\n | \n| 7<\/td>\n | 0.992546151641322<\/td>\n<\/tr>\n | \n| 8<\/td>\n | 0.9902680687415704<\/td>\n<\/tr>\n | \n| 9<\/td>\n | 0.9876883405951378<\/td>\n<\/tr>\n | \n| 10<\/td>\n | 0.984807753012208<\/td>\n<\/tr>\n | \n| 11<\/td>\n | 0.981627183447664<\/td>\n<\/tr>\n | \n| 12<\/td>\n | 0.9781476007338057<\/td>\n<\/tr>\n | \n| 13<\/td>\n | 0.9743700647852352<\/td>\n<\/tr>\n | \n| 14<\/td>\n | 0.9702957262759965<\/td>\n<\/tr>\n | \n| 15<\/td>\n | 0.9659258262890683<\/td>\n<\/tr>\n | \n| 16<\/td>\n | 0.9612616959383189<\/td>\n<\/tr>\n | \n| 17<\/td>\n | 0.9563047559630355<\/td>\n<\/tr>\n | \n| 18<\/td>\n | 0.9510565162951535<\/td>\n<\/tr>\n | \n| 19<\/td>\n | 0.9455185755993168<\/td>\n<\/tr>\n | \n| 20<\/td>\n | 0.9396926207859084<\/td>\n<\/tr>\n | \n| 21<\/td>\n | 0.9335804264972017<\/td>\n<\/tr>\n | \n| 22<\/td>\n | 0.9271838545667874<\/td>\n<\/tr>\n | \n| 23<\/td>\n | 0.9205048534524404<\/td>\n<\/tr>\n | \n| 24<\/td>\n | 0.9135454576426009<\/td>\n<\/tr>\n | \n| 25<\/td>\n | 0.9063077870366499<\/td>\n<\/tr>\n | \n| 26<\/td>\n | 0.898794046299167<\/td>\n<\/tr>\n | \n| 27<\/td>\n | 0.8910065241883679<\/td>\n<\/tr>\n | \n| 28<\/td>\n | 0.882947592858927<\/td>\n<\/tr>\n | \n| 29<\/td>\n | 0.8746197071393957<\/td>\n<\/tr>\n | \n| 30<\/td>\n | 0.8660254037844387<\/td>\n<\/tr>\n | \n| 31<\/td>\n | 0.8571673007021123<\/td>\n<\/tr>\n | \n| 32<\/td>\n | 0.848048096156426<\/td>\n<\/tr>\n | \n| 33<\/td>\n | 0.838670567945424<\/td>\n<\/tr>\n | \n| 34<\/td>\n | 0.8290375725550417<\/td>\n<\/tr>\n | \n| 35<\/td>\n | 0.8191520442889918<\/td>\n<\/tr>\n | \n| 36<\/td>\n | 0.8090169943749474<\/td>\n<\/tr>\n | \n| 37<\/td>\n | 0.7986355100472928<\/td>\n<\/tr>\n | \n| 38<\/td>\n | 0.7880107536067219<\/td>\n<\/tr>\n | \n| 39<\/td>\n | 0.7771459614569709<\/td>\n<\/tr>\n | \n| 40<\/td>\n | 0.766044443118978<\/td>\n<\/tr>\n | \n| 41<\/td>\n | 0.754709580222772<\/td>\n<\/tr>\n | \n| 42<\/td>\n | 0.7431448254773942<\/td>\n<\/tr>\n | \n| 43<\/td>\n | 0.7313537016191705<\/td>\n<\/tr>\n | \n| 44<\/td>\n | 0.7193398003386512<\/td>\n<\/tr>\n | \n| 45<\/td>\n | 0.7071067811865476<\/td>\n<\/tr>\n | \n| 46<\/td>\n | 0.6946583704589974<\/td>\n<\/tr>\n | \n| 47<\/td>\n | 0.6819983600624985<\/td>\n<\/tr>\n | \n| 48<\/td>\n | 0.6691306063588582<\/td>\n<\/tr>\n | \n| 49<\/td>\n | 0.6560590289905074<\/td>\n<\/tr>\n | \n| 50<\/td>\n | 0.6427876096865394<\/td>\n<\/tr>\n | \n| 51<\/td>\n | 0.6293203910498375<\/td>\n<\/tr>\n | \n| 52<\/td>\n | 0.6156614753256583<\/td>\n<\/tr>\n | \n| 53<\/td>\n | 0.6018150231520484<\/td>\n<\/tr>\n | \n| 54<\/td>\n | 0.5877852522924731<\/td>\n<\/tr>\n | \n| 55<\/td>\n | 0.5735764363510462<\/td>\n<\/tr>\n | \n| 56<\/td>\n | 0.5591929034707468<\/td>\n<\/tr>\n | \n| 57<\/td>\n | 0.5446390350150272<\/td>\n<\/tr>\n | \n| 58<\/td>\n | 0.5299192642332049<\/td>\n<\/tr>\n | \n| 59<\/td>\n | 0.5150380749100544<\/td>\n<\/tr>\n | \n| 60<\/td>\n | 0.5000000000000001<\/td>\n<\/tr>\n | \n| 61<\/td>\n | 0.4848096202463371<\/td>\n<\/tr>\n | \n| 62<\/td>\n | 0.46947156278589086<\/td>\n<\/tr>\n | \n| 63<\/td>\n | 0.4539904997395468<\/td>\n<\/tr>\n | \n| 64<\/td>\n | 0.43837114678907746<\/td>\n<\/tr>\n | \n| 65<\/td>\n | 0.42261826174069944<\/td>\n<\/tr>\n | \n| 66<\/td>\n | 0.4067366430758004<\/td>\n<\/tr>\n | \n| 67<\/td>\n | 0.3907311284892737<\/td>\n<\/tr>\n | \n| 68<\/td>\n | 0.3746065934159122<\/td>\n<\/tr>\n | \n| 69<\/td>\n | 0.35836794954530015<\/td>\n<\/tr>\n | \n| 70<\/td>\n | 0.3420201433256688<\/td>\n<\/tr>\n | \n| 71<\/td>\n | 0.32556815445715675<\/td>\n<\/tr>\n | \n| 72<\/td>\n | 0.30901699437494745<\/td>\n<\/tr>\n | \n| 73<\/td>\n | 0.29237170472273677<\/td>\n<\/tr>\n | \n| 74<\/td>\n | 0.27563735581699916<\/td>\n<\/tr>\n | \n| 75<\/td>\n | 0.25881904510252074<\/td>\n<\/tr>\n | \n| 76<\/td>\n | 0.24192189559966767<\/td>\n<\/tr>\n | \n| 77<\/td>\n | 0.22495105434386514<\/td>\n<\/tr>\n | \n| 78<\/td>\n | 0.20791169081775923<\/td>\n<\/tr>\n | \n| 79<\/td>\n | 0.19080899537654491<\/td>\n<\/tr>\n | \n| 80<\/td>\n | 0.17364817766693041<\/td>\n<\/tr>\n | \n| 81<\/td>\n | 0.15643446504023092<\/td>\n<\/tr>\n | \n| 82<\/td>\n | 0.13917310096006546<\/td>\n<\/tr>\n | \n| 83<\/td>\n | 0.12186934340514749<\/td>\n<\/tr>\n | \n| 84<\/td>\n | 0.10452846326765346<\/td>\n<\/tr>\n | \n| 85<\/td>\n | 0.08715574274765836<\/td>\n<\/tr>\n | \n| 86<\/td>\n | 0.06975647374412523<\/td>\n<\/tr>\n | \n| 87<\/td>\n | 0.052335956242943966<\/td>\n<\/tr>\n | \n| 88<\/td>\n | 0.03489949670250108<\/td>\n<\/tr>\n | \n| 89<\/td>\n | 0.0174524064372836<\/td>\n<\/tr>\n | \n| 90<\/td>\n | 0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n L\u01b0u \u00fd r\u1eb1ng cos(\u03b8) = sin(90\u00b0 \u2013 \u03b8), h\u1eefu \u00edch cho vi\u1ec7c tham chi\u1ebfu nhanh trong bi\u1ec3u \u0111\u1ed3 thi\u1ebft k\u1ebf.<\/p>\n B\u1ea3ng h\u00e0m ti\u1ebfp tuy\u1ebfn<\/h2>\nTangent l\u00e0 t\u1ef7 l\u1ec7 gi\u1eefa c\u1ea1nh \u0111\u1ed1i v\u00e0 c\u1ea1nh k\u1ec1, t\u0103ng t\u1eeb 0 \u0111\u1ebfn v\u00f4 c\u1ef1c khi g\u00f3c ti\u1ebfn g\u1ea7n \u0111\u1ebfn 90\u00b0. N\u00f3 r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c t\u00ednh to\u00e1n \u0111\u1ed9 d\u1ed1c c\u1ee7a \u0111\u01b0\u1eddng d\u1ed1c ho\u1eb7c b\u01b0\u1edbc ren trong c\u00e1c lo\u1ea1i \u1ed1c v\u00edt.<\/p>\n \n \n\n\n| G\u00f3c (\u00b0)<\/th>\n | Gi\u00e1 tr\u1ecb tan<\/th>\n<\/tr>\n<\/thead>\n | \n\n| 1<\/td>\n | 0.017455064928217585<\/td>\n<\/tr>\n | \n| 2<\/td>\n | 0.03492076949174773<\/td>\n<\/tr>\n | \n| 3<\/td>\n | 0.052407779283041196<\/td>\n<\/tr>\n | \n| 4<\/td>\n | 0.06992681194351041<\/td>\n<\/tr>\n | \n| 5<\/td>\n | 0.08748866352592401<\/td>\n<\/tr>\n | \n| 6<\/td>\n | 0.10510423526567646<\/td>\n<\/tr>\n | \n| 7<\/td>\n | 0.1227845609029046<\/td>\n<\/tr>\n | \n| 8<\/td>\n | 0.14054083470239145<\/td>\n<\/tr>\n | \n| 9<\/td>\n | 0.15838444032453627<\/td>\n<\/tr>\n | \n| 10<\/td>\n | 0.17632698070846497<\/td>\n<\/tr>\n | \n| 11<\/td>\n | 0.19438030913771848<\/td>\n<\/tr>\n | \n| 12<\/td>\n | 0.2125565616700221<\/td>\n<\/tr>\n | \n| 13<\/td>\n | 0.2308681911255631<\/td>\n<\/tr>\n | \n| 14<\/td>\n | 0.24932800284318068<\/td>\n<\/tr>\n | \n| 15<\/td>\n | 0.2679491924311227<\/td>\n<\/tr>\n | \n| 16<\/td>\n | 0.2867453857588079<\/td>\n<\/tr>\n | \n| 17<\/td>\n | 0.30573068145866033<\/td>\n<\/tr>\n | \n| 18<\/td>\n | 0.3249196962329063<\/td>\n<\/tr>\n | \n| 19<\/td>\n | 0.34432761328966527<\/td>\n<\/tr>\n | \n| 20<\/td>\n | 0.36397023426620234<\/td>\n<\/tr>\n | \n| 21<\/td>\n | 0.3838640350354158<\/td>\n<\/tr>\n | \n| 22<\/td>\n | 0.4040262258351568<\/td>\n<\/tr>\n | \n| 23<\/td>\n | 0.4244748162096047<\/td>\n<\/tr>\n | \n| 24<\/td>\n | 0.4452286853085361<\/td>\n<\/tr>\n | \n| 25<\/td>\n | 0.4663076581549986<\/td>\n<\/tr>\n | \n| 26<\/td>\n | 0.4877325885658614<\/td>\n<\/tr>\n | \n| 27<\/td>\n | 0.5095254494944288<\/td>\n<\/tr>\n | \n| 28<\/td>\n | 0.5317094316614788<\/td>\n<\/tr>\n | \n| 29<\/td>\n | 0.554309051452769<\/td>\n<\/tr>\n | \n| 30<\/td>\n | 0.5773502691896257<\/td>\n<\/tr>\n | \n| 31<\/td>\n | 0.6008606190275604<\/td>\n<\/tr>\n | \n| 32<\/td>\n | 0.6248693519093275<\/td>\n<\/tr>\n | \n| 33<\/td>\n | 0.6494075931975104<\/td>\n<\/tr>\n | \n| 34<\/td>\n | 0.6745085168424265<\/td>\n<\/tr>\n | \n| 35<\/td>\n | 0.7002075382097097<\/td>\n<\/tr>\n | \n| 36<\/td>\n | 0.7265425280053609<\/td>\n<\/tr>\n | \n| 37<\/td>\n | 0.7535540501027942<\/td>\n<\/tr>\n | \n| 38<\/td>\n | 0.7812856265067174<\/td>\n<\/tr>\n | \n| 39<\/td>\n | 0.8097840331950072<\/td>\n<\/tr>\n | \n| 40<\/td>\n | 0.8390996311772799<\/td>\n<\/tr>\n | \n| 41<\/td>\n | 0.8692867378162267<\/td>\n<\/tr>\n | \n| 42<\/td>\n | 0.9004040442978399<\/td>\n<\/tr>\n | \n| 43<\/td>\n | 0.9325150861376618<\/td>\n<\/tr>\n | \n| 44<\/td>\n | 0.9656887748070739<\/td>\n<\/tr>\n | \n| 45<\/td>\n | 0.9999999999999999<\/td>\n<\/tr>\n | \n| 46<\/td>\n | 1.0355303137905693<\/td>\n<\/tr>\n | \n| 47<\/td>\n | 1.0723687100246826<\/td>\n<\/tr>\n | \n| 48<\/td>\n | 1.1106125148291927<\/td>\n<\/tr>\n | \n| 49<\/td>\n | 1.1503684072210092<\/td>\n<\/tr>\n | \n| 50<\/td>\n | 1.19175359259421<\/td>\n<\/tr>\n | \n| 51<\/td>\n | 1.234897156535051<\/td>\n<\/tr>\n | \n| 52<\/td>\n | 1.2799416321930785<\/td>\n<\/tr>\n | \n| 53<\/td>\n | 1.3270448216204098<\/td>\n<\/tr>\n | \n| 54<\/td>\n | 1.3763819204711733<\/td>\n<\/tr>\n | \n| 55<\/td>\n | 1.4281480067421144<\/td>\n<\/tr>\n | \n| 56<\/td>\n | 1.4825609685127403<\/td>\n<\/tr>\n | \n| 57<\/td>\n | 1.5398649638145827<\/td>\n<\/tr>\n | \n| 58<\/td>\n | 1.6003345290410506<\/td>\n<\/tr>\n | \n| 59<\/td>\n | 1.6642794823505173<\/td>\n<\/tr>\n | \n| 60<\/td>\n | 1.7320508075688767<\/td>\n<\/tr>\n | \n| 61<\/td>\n | 1.8040477552714235<\/td>\n<\/tr>\n | \n| 62<\/td>\n | 1.8807264653463318<\/td>\n<\/tr>\n | \n| 63<\/td>\n | 1.9626105055051503<\/td>\n<\/tr>\n | \n| 64<\/td>\n | 2.050303841579296<\/td>\n<\/tr>\n | \n| 65<\/td>\n | 2.1445069205095586<\/td>\n<\/tr>\n | \n| 66<\/td>\n | 2.246036773904215<\/td>\n<\/tr>\n | \n| 67<\/td>\n | 2.355852365823753<\/td>\n<\/tr>\n | \n| 68<\/td>\n | 2.4750868534162946<\/td>\n<\/tr>\n | \n| 69<\/td>\n | 2.6050890646938023<\/td>\n<\/tr>\n | \n| 70<\/td>\n | 2.7474774194546216<\/td>\n<\/tr>\n | \n| 71<\/td>\n | 2.904210877675822<\/td>\n<\/tr>\n | \n| 72<\/td>\n | 3.0776835371752526<\/td>\n<\/tr>\n | \n| 73<\/td>\n | 3.2708526184841404<\/td>\n<\/tr>\n | \n| 74<\/td>\n | 3.4874144438409087<\/td>\n<\/tr>\n | \n| 75<\/td>\n | 3.7320508075688776<\/td>\n<\/tr>\n | \n| 76<\/td>\n | 4.0107809335358455<\/td>\n<\/tr>\n | \n| 77<\/td>\n | 4.331475874284153<\/td>\n<\/tr>\n | \n| 78<\/td>\n | 4.704630109478456<\/td>\n<\/tr>\n | \n| 79<\/td>\n | 5.144554015970307<\/td>\n<\/tr>\n | \n| 80<\/td>\n | 5.671281819617707<\/td>\n<\/tr>\n | \n| 81<\/td>\n | 6.313751514675041<\/td>\n<\/tr>\n | \n| 82<\/td>\n | 7.115369722384207<\/td>\n<\/tr>\n | \n| 83<\/td>\n | 8.144346427974593<\/td>\n<\/tr>\n | \n| 84<\/td>\n | 9.514364454222587<\/td>\n<\/tr>\n | \n| 85<\/td>\n | 11.43005230276132<\/td>\n<\/tr>\n | \n| 86<\/td>\n | 14.300666256711942<\/td>\n<\/tr>\n | \n| 87<\/td>\n | 19.08113668772816<\/td>\n<\/tr>\n | \n| 88<\/td>\n | 28.636253282915515<\/td>\n<\/tr>\n | \n| 89<\/td>\n | 57.289961630759144<\/td>\n<\/tr>\n | \n| 90<\/td>\n | Kh\u00f4ng x\u00e1c \u0111\u1ecbnh (ti\u1ebfn t\u1edbi v\u00f4 c\u1ef1c)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n Tan(45\u00b0) = 1, m\u1ed9t tham chi\u1ebfu quan tr\u1ecdng cho c\u00e1c tam gi\u00e1c \u0111\u1ec1u c\u1ea1nh trong \u0111\u1ed1i x\u1ee9ng c\u1ea5u tr\u00fac.<\/p>\n B\u1ea3ng h\u00e0m Cotang<\/h2>\nCotangent l\u00e0 ngh\u1ecbch \u0111\u1ea3o c\u1ee7a tangent, gi\u1ea3m d\u1ea7n t\u1eeb v\u00f4 c\u1ef1c \u1edf 0\u00b0 \u0111\u1ebfn 0 \u1edf 90\u00b0. N\u00f3 r\u1ea5t h\u1eefu \u00edch cho c\u00e1c ph\u00e9p t\u00ednh \u0111\u1ed9 d\u1ed1c ngh\u1ecbch \u0111\u1ea3o trong b\u1ea3n v\u1ebd k\u1ef9 thu\u1eadt ho\u1eb7c ph\u00e2n t\u00edch \u0111\u1ed9ng h\u1ecdc.<\/p>\n \n \n\n\n| G\u00f3c (\u00b0)<\/th>\n | Gi\u00e1 tr\u1ecb cot<\/th>\n<\/tr>\n<\/thead>\n | \n\n| 1<\/td>\n | 57.289961630759144<\/td>\n<\/tr>\n | \n| 2<\/td>\n | 28.636253282915515<\/td>\n<\/tr>\n | \n| 3<\/td>\n | 19.08113668772816<\/td>\n<\/tr>\n | \n| 4<\/td>\n | 14.300666256711942<\/td>\n<\/tr>\n | \n| 5<\/td>\n | 11.43005230276132<\/td>\n<\/tr>\n | \n| 6<\/td>\n | 9.514364454222587<\/td>\n<\/tr>\n | \n| 7<\/td>\n | 8.144346427974593<\/td>\n<\/tr>\n | \n| 8<\/td>\n | 7.115369722384207<\/td>\n<\/tr>\n | \n| 9<\/td>\n | 6.313751514675041<\/td>\n<\/tr>\n | \n| 10<\/td>\n | 5.671281819617707<\/td>\n<\/tr>\n | \n| 11<\/td>\n | 5.144554015970307<\/td>\n<\/tr>\n | \n| 12<\/td>\n | 4.704630109478456<\/td>\n<\/tr>\n | \n| 13<\/td>\n | 4.331475874284153<\/td>\n<\/tr>\n | \n| 14<\/td>\n | 4.0107809335358455<\/td>\n<\/tr>\n | \n| 15<\/td>\n | 3.7320508075688776<\/td>\n<\/tr>\n | \n| 16<\/td>\n | 3.4874144438409087<\/td>\n<\/tr>\n | \n| 17<\/td>\n | 3.2708526184841404<\/td>\n<\/tr>\n | \n| 18<\/td>\n | 3.0776835371752526<\/td>\n<\/tr>\n | \n| 19<\/td>\n | 2.904210877675822<\/td>\n<\/tr>\n | \n| 20<\/td>\n | 2.7474774194546216<\/td>\n<\/tr>\n | \n| 21<\/td>\n | 2.6050890646938023<\/td>\n<\/tr>\n | \n| 22<\/td>\n | 2.4750868534162946<\/td>\n<\/tr>\n | \n| 23<\/td>\n | 2.355852365823753<\/td>\n<\/tr>\n | \n| 24<\/td>\n | 2.246036773904215<\/td>\n<\/tr>\n | \n| 25<\/td>\n | 2.1445069205095586<\/td>\n<\/tr>\n | \n| 26<\/td>\n | 2.050303841579296<\/td>\n<\/tr>\n | \n| 27<\/td>\n | 1.9626105055051503<\/td>\n<\/tr>\n | \n| 28<\/td>\n | 1.8807264653463318<\/td>\n<\/tr>\n | \n| 29<\/td>\n | 1.8040477552714235<\/td>\n<\/tr>\n | \n| 30<\/td>\n | 1.7320508075688767<\/td>\n<\/tr>\n | \n| 31<\/td>\n | 1.6642794823505173<\/td>\n<\/tr>\n | \n| 32<\/td>\n | 1.6003345290410506<\/td>\n<\/tr>\n | \n| 33<\/td>\n | 1.5398649638145827<\/td>\n<\/tr>\n | \n| 34<\/td>\n | 1.4825609685127403<\/td>\n<\/tr>\n | \n| 35<\/td>\n | 1.4281480067421144<\/td>\n<\/tr>\n | \n| 36<\/td>\n | 1.3763819204711733<\/td>\n<\/tr>\n | \n| 37<\/td>\n | 1.3270448216204098<\/td>\n<\/tr>\n | \n| 38<\/td>\n | 1.2799416321930785<\/td>\n<\/tr>\n | \n| 39<\/td>\n | 1.234897156535051<\/td>\n<\/tr>\n | \n| 40<\/td>\n | 1.19175359259421<\/td>\n<\/tr>\n | \n| 41<\/td>\n | 1.1503684072210092<\/td>\n<\/tr>\n | \n| 42<\/td>\n | 1.1106125148291927<\/td>\n<\/tr>\n | \n| 43<\/td>\n | 1.0723687100246826<\/td>\n<\/tr>\n | \n| 44<\/td>\n | 1.0355303137905693<\/td>\n<\/tr>\n | \n| 45<\/td>\n | 1.000000000000000<\/td>\n<\/tr>\n | \n| 46<\/td>\n | 0.9656887748070739<\/td>\n<\/tr>\n | \n| 47<\/td>\n | 0.9325150861376618<\/td>\n<\/tr>\n | \n| 48<\/td>\n | 0.9004040442978399<\/td>\n<\/tr>\n | \n| 49<\/td>\n | 0.8692867378162267<\/td>\n<\/tr>\n | \n| 50<\/td>\n | 0.8390996311772799<\/td>\n<\/tr>\n | \n| 51<\/td>\n | 0.8097840331950072<\/td>\n<\/tr>\n | \n| 52<\/td>\n | 0.7812856265067174<\/td>\n<\/tr>\n | \n| 53<\/td>\n | 0.7535540501027942<\/td>\n<\/tr>\n | \n| 54<\/td>\n | 0.7265425280053609<\/td>\n<\/tr>\n | \n| 55<\/td>\n | 0.7002075382097097<\/td>\n<\/tr>\n | \n| 56<\/td>\n | 0.6745085168424265<\/td>\n<\/tr>\n | \n| 57<\/td>\n | 0.6494075931975104<\/td>\n<\/tr>\n | \n| 58<\/td>\n | 0.6248693519093275<\/td>\n<\/tr>\n | \n| 59<\/td>\n | 0.6008606190275604<\/td>\n<\/tr>\n | \n| 60<\/td>\n | 0.5773502691896257<\/td>\n<\/tr>\n | \n| 61<\/td>\n | 0.554309051452769<\/td>\n<\/tr>\n | \n| 62<\/td>\n | 0.5317094316614788<\/td>\n<\/tr>\n | \n| 63<\/td>\n | 0.5095254494944288<\/td>\n<\/tr>\n | \n| 64<\/td>\n | 0.4877325885658614<\/td>\n<\/tr>\n | \n| 65<\/td>\n | 0.4663076581549986<\/td>\n<\/tr>\n | \n| 66<\/td>\n | 0.4452286853085361<\/td>\n<\/tr>\n | \n| 67<\/td>\n | 0.4244748162096047<\/td>\n<\/tr>\n | \n| 68<\/td>\n | 0.4040262258351568<\/td>\n<\/tr>\n | \n| 69<\/td>\n | 0.3838640350354158<\/td>\n<\/tr>\n | \n| 70<\/td>\n | 0.36397023426620234<\/td>\n<\/tr>\n | \n| 71<\/td>\n | 0.34432761328966527<\/td>\n<\/tr>\n | \n| 72<\/td>\n | 0.3249196962329063<\/td>\n<\/tr>\n | \n| 73<\/td>\n | 0.30573068145866033<\/td>\n<\/tr>\n | \n| 74<\/td>\n | 0.2867453857588079<\/td>\n<\/tr>\n | \n| 75<\/td>\n | 0.2679491924311227<\/td>\n<\/tr>\n | \n| 76<\/td>\n | 0.24932800284318068<\/td>\n<\/tr>\n | \n| 77<\/td>\n | 0.2308681911255631<\/td>\n<\/tr>\n | \n| 78<\/td>\n | 0.2125565616700221<\/td>\n<\/tr>\n | \n| 79<\/td>\n | 0.19438030913771848<\/td>\n<\/tr>\n | \n| 80<\/td>\n | 0.17632698070846497<\/td>\n<\/tr>\n | \n| 81<\/td>\n | 0.15838444032453627<\/td>\n<\/tr>\n | \n| 82<\/td>\n | 0.14054083470239145<\/td>\n<\/tr>\n | \n| 83<\/td>\n | 0.1227845609029046<\/td>\n<\/tr>\n | \n| 84<\/td>\n | 0.10510423526567646<\/td>\n<\/tr>\n | \n| 85<\/td>\n | 0.08748866352592401<\/td>\n<\/tr>\n | \n| 86<\/td>\n | 0.06992681194351041<\/td>\n<\/tr>\n | \n| 87<\/td>\n | 0.052407779283041196<\/td>\n<\/tr>\n | \n| 88<\/td>\n | 0.03492076949174773<\/td>\n<\/tr>\n | \n| 89<\/td>\n | 0.017455064928217585<\/td>\n<\/tr>\n | \n| 90<\/td>\n | 0 (ti\u1ebfn g\u1ea7n \u0111\u1ebfn 0)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n Cot(\u03b8) = tan(90\u00b0 \u2013 \u03b8), cung c\u1ea5p m\u1ed9t m\u1ed1i quan h\u1ec7 thu\u1eadn ti\u1ec7n \u0111\u1ec3 ki\u1ec3m ch\u1ee9ng.<\/p>\n \u1ee8ng d\u1ee5ng trong thi\u1ebft k\u1ebf c\u01a1 kh\u00ed<\/h2>\nTrong k\u1ef9 thu\u1eadt c\u01a1 kh\u00ed, c\u00e1c h\u00e0m n\u00e0y \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong vi\u1ec7c t\u00ednh to\u00e1n g\u00f3c ren bu l\u00f4ng (v\u00ed d\u1ee5: 60\u00b0 trong ren h\u1ec7 m\u00e9t), ph\u00e2n t\u00edch l\u1ef1c trong k\u1ebft c\u1ea5u gi\u00e0n ho\u1eb7c thi\u1ebft k\u1ebf c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p nghi\u00eang. V\u00ed d\u1ee5, tan(\u03b8) x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 cao tr\u00ean \u0111\u1ed9 ch\u1ea1y trong h\u1ec7 th\u1ed1ng b\u0103ng t\u1ea3i, trong khi sin v\u00e0 cos ph\u00e2n t\u00edch c\u00e1c th\u00e0nh ph\u1ea7n tr\u1ecdng l\u1ef1c trong ph\u00e2n t\u00edch t\u1ea3i tr\u1ecdng.<\/p>\n \n- T\u00ednh \u1ee9ng su\u1ea5t c\u1eaft trong c\u00e1c m\u1ed1i n\u1ed1i g\u00f3c b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng sin(\u03b8).<\/li>\n
- S\u1eed d\u1ee5ng cos(\u03b8) cho l\u1ef1c ph\u00e1p tuy\u1ebfn trong c\u01a1 c\u1ea5u n\u00eam.<\/li>\n
- \u00c1p d\u1ee5ng tan(\u03b8) cho c\u00e1c g\u00f3c ma s\u00e1t trong c\u00e1c thi\u1ebft b\u1ecb k\u1eb9p.<\/li>\n
- S\u1eed d\u1ee5ng cot(\u03b8) trong bi\u00ean d\u1ea1ng r\u0103ng b\u00e1nh r\u0103ng cho t\u1ef7 s\u1ed1 ngh\u1ecbch \u0111\u1ea3o.<\/li>\n<\/ol>\n
T\u00edch h\u1ee3p v\u1edbi c\u00e1c ph\u1ea7n m\u1ec1m nh\u01b0 AutoCAD \u0111\u1ec3 l\u1eadp m\u00f4 h\u00ecnh ch\u00ednh x\u00e1c, \u0111\u1ea3m b\u1ea3o thi\u1ebft k\u1ebf \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n an to\u00e0n.<\/p>\n C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/h2>\n\n C\u00e1c gi\u00e1 tr\u1ecb l\u01b0\u1ee3ng gi\u00e1c n\u00e0y ch\u00ednh x\u00e1c \u0111\u1ebfn m\u1ee9c n\u00e0o?<\/h3>\nC\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n \u0111\u1ebfn 15 ch\u1eef s\u1ed1 th\u1eadp ph\u00e2n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c th\u01b0 vi\u1ec7n to\u00e1n h\u1ecdc ti\u00eau chu\u1ea9n, \u0111\u1ee7 \u0111\u1ed9 ch\u00ednh x\u00e1c cho k\u1ef9 thu\u1eadt; l\u00e0m tr\u00f2n khi c\u1ea7n thi\u1ebft \u0111\u1ec3 tr\u00e1nh sai s\u00f3t trong c\u00e1c ph\u00e9p t\u00ednh.<\/p>\n T\u1ea1i sao l\u1ea1i s\u1eed d\u1ee5ng \u0111\u1ed9 thay v\u00ec radian?<\/h3>\n\u0110\u1ed9 l\u00e0 \u0111\u01a1n v\u1ecb ph\u1ed5 bi\u1ebfn trong b\u1ea3n v\u1ebd k\u1ef9 thu\u1eadt; h\u00e3y chuy\u1ec3n \u0111\u1ed5i sang radian (\u03b8_rad = \u03b8_deg * \u03c0 \/ 180) \u0111\u1ec3 s\u1eed d\u1ee5ng v\u1edbi c\u00e1c c\u00f4ng c\u1ee5 t\u00ednh to\u00e1n nh\u01b0 MATLAB ho\u1eb7c Python.<\/p>\n N\u1ebfu t\u00f4i c\u1ea7n gi\u00e1 tr\u1ecb cho c\u00e1c g\u00f3c l\u1edbn h\u01a1n 90\u00b0 th\u00ec sao?<\/h3>\nS\u1eed d\u1ee5ng c\u00e1c t\u00ednh ch\u1ea5t tu\u1ea7n ho\u00e0n: sin(180\u00b0 \u2013 \u03b8) = sin(\u03b8), cos(180\u00b0 \u2013 \u03b8) = -cos(\u03b8); m\u1edf r\u1ed9ng b\u1ea3ng t\u01b0\u01a1ng \u1ee9ng \u0111\u1ec3 ph\u00e2n t\u00edch to\u00e0n v\u00f2ng trong ph\u00e9p quay.<\/p>\n C\u00e1c ch\u1ee9c n\u0103ng n\u00e0y \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng nh\u01b0 th\u1ebf n\u00e0o trong thi\u1ebft k\u1ebf \u1ed1c v\u00edt?<\/h3>\nTrong h\u00ecnh h\u1ecdc ren, tan(30\u00b0) \u2248 0,577 gi\u00fap t\u00ednh to\u00e1n g\u00f3c b\u01b0\u1edbc ren; sin v\u00e0 cos gi\u1ea3i quy\u1ebft c\u00e1c l\u1ef1c d\u1ecdc tr\u1ee5c v\u00e0 h\u01b0\u1edbng t\u00e2m \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u00f4ng s\u1ed1 m\u00f4-men xo\u1eafn.<\/p>\n T\u00f4i c\u00f3 th\u1ec3 n\u1ed9i suy gi\u1eefa c\u00e1c gi\u00e1 tr\u1ecb trong b\u1ea3ng kh\u00f4ng?<\/h3>\n\u0110\u00fang v\u1eady, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng ph\u00e9p n\u1ed9i suy tuy\u1ebfn t\u00ednh \u0111\u1ec3 \u01b0\u1edbc l\u01b0\u1ee3ng, nh\u01b0ng \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ed9 ch\u00ednh x\u00e1c cao, h\u00e3y s\u1eed d\u1ee5ng m\u00e1y t\u00ednh ho\u1eb7c ph\u1ea7n m\u1ec1m \u0111\u1ec3 t\u00ednh to\u00e1n gi\u00e1 tr\u1ecb ch\u00ednh x\u00e1c cho c\u00e1c g\u00f3c kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ed1 nguy\u00ean.<\/p>\n M\u1ed1i quan h\u1ec7 gi\u1eefa tan v\u00e0 cot l\u00e0 g\u00ec?<\/h3>\nCot(\u03b8) = 1 \/ tan(\u03b8), h\u1eefu \u00edch \u0111\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh trong ph\u00e2n t\u00edch \u1ed5n \u0111\u1ecbnh c\u1ee7a c\u00e1c k\u1ebft c\u1ea5u c\u01a1 kh\u00ed.<\/p>\n<\/div>\n <\/p>","protected":false},"excerpt":{"rendered":" Article Outline This article presents a detailed trigonometric functions table, optimized for practical use in mechanical engineering. The structure is as follows: Introduction to Trigonometric Functions Definitions and Basic Principles Sine Function Table Cosine Function Table Tangent Function Table Cotangent Function Table Applications in Mechanical Design Frequently Asked Questions (FAQ) Introduction to Trigonometric Functions Trigonometric […]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[220],"tags":[],"class_list":["post-5735","post","type-post","status-publish","format-standard","hentry","category-technical-documentation-and-references"],"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5735","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/comments?post=5735"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5735\/revisions"}],"predecessor-version":[{"id":5737,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5735\/revisions\/5737"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5735"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5735"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5735"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} | | | |