# stationary points of f(x)= sin^3xcosx

• February 4th 2013, 06:55 AM
Boo
stationary points of f(x)= sin^3xcosx
Please, I search for stationary points of f(x)=sin^3xcosx
I got x +kpi
x/2 +kpi

but result is only first
why??Who is right???
many thanks!!!
• February 4th 2013, 07:34 AM
Plato
Re: stationary points of f(x)= sin^3xcosx
Quote:

Originally Posted by Boo
Please, I search for stationary points of f(x)=sin^3xcosx
I got x +kpi
x/2 +kpi

Do you mean that $\sin^3(x)\cos(x)$ is the derivative?
Or is that the function for which you are to find stationary points?

If it is the second the neither of those is the answer.
• February 4th 2013, 08:42 AM
Boo
Re: stationary points of f(x)= sin^3xcosx
No, sorry, points of inflection!!!