(1-cos x)/(1+cos x)

int(1-cos x)/(cos x(1+cos x))dx

Evaluate: int(1-cos x)/(cos x(1+cos x))dx

lim_(x to 0) (1 - cos 4x)/(1 - cos x) = _________

tan ^(-1)(sqrt((1-cos 3 x)/(1+cos x)))

(cos x)/(1-sin x)=(1+cos x+sin x)/(1+cos x-sin x)

tan^(-1){(sqrt(1+cos x)+sqrt(1-cos x))/(sqrt(1+cos x)-sqrt(1-cos x))}

Simplest form of tan^(-1)((sqrt(1+cos x)+sqrt(1-cos x))/(sqrt(1+cos x)-sqrt(1-cos x))), pi lt x lt (3 pi)/(2) is:

Prove that: (i)tan^(-1){(sqrt(1+cos x)+sqrt(1-cos x))/(sqrt(1+cos x)-sqrt(1-cos x))}=(pi)/(4)+(x)/(2)

Prove that: tan^(^^)(-1){(sqrt(1+cos x)+sqrt(1-cos x))/(sqrt(1+cos x)-sqrt(1-cos x))}=pi/4-x/2, if pi

If pi