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

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

The derivative of sinx cosx is:

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 (sinx)^n

Find the derivative of (5sinx - 6cosx + 7)

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 x^4(5sinx - 3cosx)

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

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