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Java Games: Flashcards, matching, concentration, and word search. |
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Trig Identities
Students need to master certain identities when studying trigonometry
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| A | B |
|---|
| tan t | sin t/cos t |
| cot t | cos t/sin t |
| sin^2 t + cos^2 t | 1 |
| 1 + tan^2 t | sec^2 t |
| 1 + cot^2 t | csc^2 t |
| csc t | 1/ sin t |
| sec t | 1/ cos t |
| sin (a + b) | sin a*cos b + cos a*sin b |
| sin (a - b) | sin a*cos b - cos a*sin b |
| cos (a + b) | cos a *cos b - sin a* sin b |
| cos (a - b) | cos a *cos b + sin a* sin b |
| tan (a +b) | (tan a + tan b)/(1-tan a* tan b) |
| tan (a -b) | (tan a - tan b)/(1+tan a* tan b) |
| sin(2a) | 2sin a* cos a |
| tan (2a) | (2 tan a)/(1 - tan^2 a) |
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