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March 26, 2017

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y= (cos^3 x) (cos 3x)

I got -3 sin(3x) cos^3x - 3 sin(x) cos (3x) cos^2 (x) using the product rule

Is this right? Thanks.

  • Cos-Derivative - ,

    yes

  • Cos-Derivative - ,

    Thanks!

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