have this function g(x)=cos(x)exp(2/3sin(x)) 0<x<2pie
also have derivative (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 to 0 but thats as far i as go.
any help would be great