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Trig IDs
Question | Answer |
---|---|
csc t | 1/sin t |
sec t | 1/cos t |
cot t | 1/tan t |
tan t | sin t/cos t |
cot t (2) | cos t/sin t |
sin^2t + cos^2t | 1 |
1 + tan^2t | sec^2t |
1 + cot^2t | csc^2t |
sin (-t) | -sin t |
cos (-t) | cos t |
tan (-t) | -tan t |
sin (u +v) | sin u cos v + sin v cos u |
cos (u+v) | cos u cosv - sin u sin v |
tan (u+v) | tan u + tan v/ 1- tan u tan v |
sin (u-v) | sin u cos v - sin v cos u |
cos (u-v) | cos u cos v + sin u sin v |
tan (u-v) | tan u - tan v/ 1+ tan u tan v |
sin 2u | 2 sin u cos u |
cos 2u | cos^2u-sin^2u |
tan 2u | 2tan u/1- tan^2u |
Special Triangle : 90/45/45 | sqrt 2/1/1 |
Special Triangle: 90/60/30 | 2/sqrt 3/1 |