1/(1+cot^2 x)
(1 - cos x)(1 + cos x) csc^2 x
√(sec^2 x - 1)
1 / csc^2 x
sin x cot x
1 / cot x
tan ^2 x / sec^2 x
sec x csc^2 x / cot^2 x
sec x / csc x
sin^2 x + cos^2 x
1 - cos^2 x
1 / sec x
cot x tan x
sin(π/2 - x) sec x
√(1-sin^2 x )
sec^3 x (sin x - sin^3 x)
cos^2 (-x) - sin (-x) sin x
