Difficult Trigo Integration, with surd.

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  • Thread starter wlooi
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wlooi
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∫sin x√(1+cos2x) dx

This question have bugged me for 2 days. Need help please..
 
Have you tried letting u=cosx, du=-sinxdx?
You're then left with something that you can yet use another substitution on.
Let's see what you can get.