Common derivatives challenge

Given $~f(x)=x+\sin x\,$space, f, left parenthesis, x, right parenthesis, equals, x, plus, sine, x. What is the value of $~f\,^\prime \Big(\dfrac{\pi}{2}\Big)\,$space, f, prime, left parenthesis, start fraction, pi, divided by, 2, end fraction, right parenthesis?