3.x.cos x

(cos3x-cos x)/(cos x+cos3x)

If sin x+cos x=1+sin x.cos x then x=

(sin3x + sin x) sin x + (cos3x-cos x) cos x = 0

Prove that: (sin3x+sin x)sin x+(cos3x-cos x)cos x=0

Discuss the continuity of the following functions: (a) f(x) = sin x + cos x (b) f(x) = sin x - cos x (c) f(x) = sin x . cos x

Prove that (cos x + sin x)/(cos x - sin x) - (cos x - sin x)/(cos x + sin x) = 2 tan x

The period of function (|sin x|+|cos x|)/(|sin x-cos x|+|sin x+cos x|) is :

The period of function (|sin x|+|cos x|)/(|sin x-cos x|+|sin x+cos x|) is :

(sin x+x cos x)/(x sin x-cos x)