kashmacksoutm
kashmacksoutm kashmacksoutm
  • 21-07-2016
  • Mathematics
contestada

Use logarithmic differentiation to find the derivative of the function: y=(cos 2x)^x.

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meerkat18
meerkat18 meerkat18
  • 21-07-2016
 The derivative of the given function y = (cos 2x)^x can be obtained by transforming the given expression into its logarithmic form. 
 y = (cos 2x)^x
ln y = x ln (cos 2x)
dy/y = x * -dx/2 sin 2x +  
 ln (cos 2x) dx
dy/dx = -xy/2 sin 2x + 
 ln (cos 2x). This is the final answer 
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