Hello there,

I have a question where i have to find stationary points and then determin whether they are maximum or minimum:

y=2sin(x) -(x)

i get dy/dx = 2cos(x) - 1 and equal to zero i get 1/3 pi. With it obviously being a sine curve, how can i find the next stationary point?

Also d^2y/dx^2 i get:

-2sin(x)

which at 1/3 pi gives me -3^1/2 but in the anser book its minus root 3 minus third pi... where have i gone wrong?

Thanks!