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How do I integrate cos^2(x)?
The key to solving any integral of this form is to use the cosine rule:
cos(2x) = cos2(x) - sin2(x) = 2cos2
how to integrate by parts
If you aren't lucky enough to be told in the question, the first thing we have to do is know when we should you integration by parts.
TM
Answered by Tim M. • Maths tutor
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