 Hello and welcome to the session. My name is Mansi and I'm going to help you with the following question. The question says find the derivative of the following function pi secant x plus 4 cos x. Let us see the solution behind the question. Now fx is given to be pi secant x plus 4 cos x. So f dash x will be derivative with respect to x of this function plus derivative with respect to x of this function. Derivative with respect to x of 5 secant x will be 5 into dy dx of secant x plus 4 into dy dx of cos x which is equal to 5 into secant x tan x because dy dx of secant x is secant x tan x plus 4 into dy dx of cos x that is minus sin x. So our answer to this question is 5 secant x tan x minus 4 sin x. So this is our answer to the question. I hope that you understood the question and enjoyed the session. Have a good day.