Posted by lizzy on Monday, October 8, 2012 at 6:10am.
Find derivative of:
g(theta) = cos^2(2theta1)

calculus help!!!!  Reiny, Monday, October 8, 2012 at 8:50am
g ' (Ø) = 2cos(2Ø 1) (2)
= ...

calculus help!!!!  Steve, Monday, October 8, 2012 at 10:21am
hmmm. power rule, then chain rule twice

calculus help!!!!  Reiny, Monday, October 8, 2012 at 11:07am
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)
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