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Question

Integrate the following functions.
2cosx3sinx6cosx+4sinxdx

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Solution

2cosx3sinx6cosx+4sinxdx=2cosx3sinx2(3cosx+2sinx)dx
Let 3 cos x +2 sin x=t
3sinx+2cosx=dtdxdx=dt2cosx3sinx2cosx3sinx2(3cosx+2sinx)dx=2cosx3sinx2(t)dt2cosx3sinx=121tdt=12log|t|+C=12log|3cosx+2sinx|+C


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