sqrt((1+cos x)/(1-cos x))=......

Find range of y=sqrt((1-cos x)sqrt((1-cos x)...oo))

If y = sqrt((1 + cos 2x)/(1-cos 2x))" find " (dy)/(dx)

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

Find the derivatives of "tan"^(-1) sqrt((1+cos2x)/(1-cos2x))

prove that cot^(-1)[sqrt((1+cos3x)/(1-cos3x))]

lim_(x rarr0)(sqrt(1-cos x^(2)))/(1-cos x)=

prove that tan^(-1)((cos x)/(1-sin x))-cot^(-1)((sqrt(1+cos x))/(sqrt(1-cos x)))=(pi)/(4),x varepsilon(0,(pi)/(2))