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OpenStudy (anonymous):
nth derivative of cos5x.cos3x
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OpenStudy (anonymous):
Hi, and welcome! Have you heard of the Leibniz Rule? (It's ok if you haven't!)
OpenStudy (anonymous):
Hi...no i have not heard about it yet..can u explain me the answer apart from that theorem
OpenStudy (anonymous):
Okay, we don't need to use that rule if you haven't heard of it. First of all then, can you think of a way to simplify "cos5x.cos3x"?
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