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Simplifying a trigonometric product

  1. Oct 2, 2012 #1
    Was just double checking if we can simplify this in the following way,

    ∫ sinx * √(1 + cos2x) dx = ∫ sinx * (1 + cosx) dx
     
  2. jcsd
  3. Oct 2, 2012 #2

    SammyS

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    No.

    Is [itex]\sqrt{3^2+4^2}=7\ ?[/itex] No !

    [itex]\sqrt{3^2+4^2}=\sqrt{25}=5\ .[/itex].

    To solve that integral, use substitution .

    Ask your self, what's the derivative of cos(x) ?
     
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