" 12."(1-cos r)/(1+cos x)

Differentiate w.r.t x (1-cos x)//(1+ cos x)

Differentiate the following functions w.r.t.x. (1 - cos x)/(1 + cos x)

Differentiate the following w.r.t. x; tan^(-1) sqrt((1 - cos x)/(1 + cos x))

Find the derivative of the w.r.t.x (1- cos 2x)/( 1 + cos 2x)

Differentiate the following w.r.t.x. "log" sqrt((1 - cos x)/(1 + cos x))

Differentiate the following w.r.t. x : tan^-1 sqrt((1+cos x)/(1-cos x))

If p = cos x - sin x, q = (1 - sin ^(3) x)/( 1 - sin x) , r = (1 + cos ^(3) x)/( 1 + cos x) what is the value of p + q + r ?