front 1 cos2x+sin2x | back 1 1 |
front 2 acosx+bsinx | back 2 √(a2+b2)cos(x-arctan(b/a)) |
front 3 cosxcosy+sinxsiny | back 3 cos(x+y) |
front 4 cosxcosy+sinxsiny | back 4 cos(x-y) |
front 5 cos1/2x | back 5 ±√[1/2(1+cosx)] |
front 6 2cos2x-1 | back 6 cos2x |
front 7 cos2x-sin2x | back 7 cos2x |
front 8 1-2sin2x | back 8 cos2x |
front 9 cot(90º-x) | back 9 tanx |
front 10 cosx/sinx | back 10 cotx |
front 11 cot2x+1 | back 11 csc2x |
front 12 csc(-x) | back 12 -cscx |
front 13 sec(-x) | back 13 sec x |
front 14 sin 1/2 x | back 14 ±√[1/2(1-cosx)] |
front 15 2sinxcosx | back 15 sin2x |
front 16 tan(90º-x) | back 16 cot |
front 17 (1-cosx)/sinx | back 17 tan1/2x |
front 18 sinx/cosx | back 18 tanx |
front 19 (2tanx)/(1-tan2x) | back 19 tan2x |
front 20 tan2x+1 | back 20 sec2x |
front 21 cos(x− y) | back 21 cos x cos y + sin x sin y |
front 22 cos(x+ y) | back 22 cosxcos y-sin x sin y |