calculus help!!!!

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Find derivative of:
g(theta) = cos^2(2theta-1)

  • calculus help!!!! -

    g ' (Ø) = 2cos(2Ø -1) (2)
    = ...

  • calculus help!!!! -

    hmmm. power rule, then chain rule twice

  • calculus help!!!! -

    yup, forgot about the exponent, Steve is right

    g ' (x) = 2 cos(2Ø-1) (-sin(Ø-1)) ( 2)
    = -4 sin(2Ø-1)cos(2Ø-1)

    which they might have changed to
    -2 sin(4Ø-2)

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