Help with simplify - MaplePrimes

Question:Help with simplify

Posted: dglevitt 110 Product: Maple

January 04 2018

How do I take the square root of :

X:= r² (R + r cos(v))²

with the condition that R and r are positive and R>r and get:

r (R+ r cos(v))

I assume I need to use simplify with some assumptions, but I cannot figure it out.

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