Find the derivative of the following functions : cosec x.

Find the derivative of the following function: cosec x

Find the derivative of the following function: sin xcos x

Find the derivative of the following functions sin x cos x

Find the derivatives of the following functions: (x+secx)(x-tanx)

Find the derivatives of the following functions at the indicated points. (cosec^2 x + tan x + cotx)^7 at x = pi/4

Find the derivatives of the following function : f (x) =x+a.

Find the derivatives of the following function : f (x) =a.

Find the derivatives of the following function : y=x^2 .