Question

Find all points on [0, 2pi] at which f(x)=2sinx+sin^2x has horizontal tangent. Help with after finding the derivative?

Answer 1

for the tangent to be horizontal, f'(x)=0

Answer 2

So find all x that make f'(x)=0 basically?

Answer 3

yep

Answer 4

And plug that into f(x) to find y?

Answer 5

that's right