Originally Posted by

**smartcar29** hi

have this function g(x)=cos(x)exp(2/3sin(x)) 0<x<2pie

also have derivative $\displaystyle g'(x)=1/3(2-3sinx-2sin^2x)$(exp2/3sinx)

i need to find the stationary points of g(x) and classify each point min and max. the domain is [0,2pie]

my main problem is i do not know how to get any values to use in original function i am not sure about trig identity. i am sure that i need to set $\displaystyle 1/3(2-3sinx-2sin^2x)$ to 0 but thats as far i as go.

any help would be great