5445405
Description
Flashcards by leela_richardson, updated more than 1 year ago
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Created by leela_richardson
almost 9 years ago
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| Question | Answer |
| 1/cosx | secx |
| 1/tanx | cotx |
| Main identity | sin^2x + cos^2x = 1 |
| sec^2x | tan^2x + 1 |
| cosec^2x | 1+ cot^2x |
| sin(x +y) | sinxcosy + sinycosx |
| sin (x-y) | sinxcosy - sinycosx |
| co (x + y) | cosxcosy - sinxsiny |
| cos (x - y) | cosxcosy + sinxsiny |
| tan (x + y) | (tanx + tany) / (1- tanxtany) |
| tan (x -y) | (tanx - tany)/ (1+ tanxtany) |
| sin2x | 2cosxsinx |
| cos2x | 2cos^2x - 1 OR 1- 2sin^2x OR cos^2x - sin^2x |
| tan2x | (2tanx)/ (1-tan^2x) |
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