front 1 sin2x | back 1 2sinxcosx |
front 2 cos2x | back 2 cos²x - sin²x |
front 3 tan2x | back 3 sin2x / cos2x |
front 4 sin(A+B) | back 4 sinAcosB + sinBcosA |
front 5 sin(A-B) | back 5 sinAcosB - sinBcosA |
front 6 cos(A+B) | back 6 cosAcosB - sinAsinB |
front 7 cos(A-B) | back 7 cosAcosB + sinAsinB |
front 8 tan(A+B) | back 8 sin(A+B) / cos(A+B) |
front 9 tan(A-B) | back 9 sin(A-B) / cos(A-B) |
front 10 sin²x | back 10 1 - cos2x / 2 |
front 11 cos²x | back 11 1 + cos2x / 2 |
front 12 sinx/2 | back 12 ±√((1 - cos(x)) / 2) |
front 13 cosx/2 | back 13 ±√((1 + cos x) / 2) |
front 14 tanx/2 | back 14 sinx / 1 + cosx |
front 15 tan²x | back 15 sin²x / cos²x |
front 16 sin²x + cos²x | back 16 1 |
front 17 1 + tan²x | back 17 sec²x |
front 18 1 + cot²x | back 18 csc²x |
front 19 sin(π/2 − x) | back 19 cosx |