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Posted by on Sunday, October 7, 2007 at 7:50pm.

how would i find the derivative of this problem: t-.3t^2+cos 4t? I don't know how to find the derivative of cos 4t

  • math - , Sunday, October 7, 2007 at 8:19pm

    d/dx cos4x= -sin 4x (4) or -4sin(4x)

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