Use delta method of find the derivative of `cot(2x+1)`

Use delta method to find the derivative of sec(2x-1) .

find the derivative of tan(2x)

Use delta method to find the derivative of sinx+cosx .

Use delta method to find the derivative of x sin x.

Use the delta method to find the derivative of f (x) = x^4 .Hence find f'(-1/2) and and f’(0).

Find the derivative of 2/(x+1)

Use delta method to find the derivatives of the following : cot (2x + 1).

Use delta method to find the derivatives of the following : sec (2x- 1) .

Use delta method to find the derivatives of the following : tan 2x .

Use delta method to find the derivatives of the following : sin (x + 1) .