Question

Please answer the following question

Answer 1

Answer:

f(x)=xsinx

f

′

(x)=d/dx(xsinx)=xcosx+sinx

At x=π/2,f

′

(x)=π/2∗cos(π/2)+sin(π/2)=0+1=1

Hence, f

′

(π/2)=1