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

[(d)/(dx)[log sqrt((1-cos2x)/(1+cos2x))]

Differentiate the following w.r.t. x: log sqrt((1-cos 3x)/(1+cos 3x))

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

If y = log sqrt((1 + cos^2 x)/(1 - e^(2x))), find (dy)/(dx) .

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

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

If the function f(x)=(sqrt(1+cos x)+sqrt(1-cos x))/(sqrt(1+cos x)-sqrt(1-cos x)) If the value of f((pi)/(3))=a+b sqrt(c) then a+b+c=