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Question

Integrate the function 2+sin2x1+cos2xex

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Solution

I=(2+sin2x1+cos2x)ex
=(2+2sinxcosx2cos2x)ex
=(1+sinxcosxcos2x)ex
=(sec2x+tanx)ex
Let f(x)=tanxf(x)=sec2x
I=(f(x)+f(x)]exdx
=exf(x)+C
=extanx+C

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