Posted by lizzy on .
Find derivative of:
g(theta) = cos^2(2theta1)

calculus help!!!! 
Reiny,
g ' (Ø) = 2cos(2Ø 1) (2)
= ... 
calculus help!!!! 
Steve,
hmmm. power rule, then chain rule twice

calculus help!!!! 
Reiny,
yup, forgot about the exponent, Steve is right
g ' (x) = 2 cos(2Ø1) (sin(Ø1)) ( 2)
= 4 sin(2Ø1)cos(2Ø1)
which they might have changed to
2 sin(4Ø2)