Question

Question #ec230

Answer 1

`cos(x+a)`

Explanation:

We can find the derivative using the Chain Rule:

Let `theta=(x+a)`

Derivative of `sintheta=costheta`
Derivative of `(x+a)=1+0=1`

Therefore, derivative of `sin(x+a)=cos(x+a)*1=cos(x+a)`