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Stack #4633695
| Question | Answer |
|---|---|
| sin(a+b) | sina * cosb + cosa * sinb |
| sin(a-b) | sina * cosb - cosa * sinb |
| cos(a+b) | cosa * cosb - sina * sinb |
| cos(a-b) | cosa * cosb + sina * sinb |
| tan(a+b) | tana + tanb / 1- (tana * tanb) |
| tan(a-b) | tana - tanb / 1 + (tana * tanb) |
| sin2x | 2sinx * cosx |
| cos2x | cos^2(x) - sin^2(x) OR 2cos^2(x)-1 OR 1-2sin^2(x) |
| tan2x | 2tanx / 1-tan^2(x) |
| sin(-x) | -sin(x) |
| -sin(x) | sin(-x) |
| cos(-x) | cos(x) |
| csc(-x) | -csc(x) |
| -csc(x) | csc(-x) |
| sec(-x) | sec(x) |
| tan(-x) | -tan(x) |
| -tan(x) | tan(-x) |
| sin(x/2) | |
| tan(x/2) | 1-cosx/sinx |
| 1-cosx/sinx | sinx/1+cosx |
| sinx/1+cosx | tan(x/2) |
Created by:
user-2026386