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Trig Review
| Question | Answer |
|---|---|
| sin^2x+cos^2x | 1 |
| cot^x+1 | csc^2x |
| tan^2x+1 | sec^2x |
| sinx / cosx | tanx |
| cos2x | cos^2x-sin^2x |
| sin2x | 2sinxcosx |
| sin30 | 1/2 |
| sin45 | √ 2/2 |
| sin60 | √ 3/2 |
| cos30 | √ 3/2 |
| cos45 | √ 2/2 |
| cos60 | 1/2 |
| tan30 | √ 3/3 |
| tan45 | 1 |
| tan60 | √ 3 |