Find the sum: Cos^2 (0) + Cos^2 (2) + Cos^2 (4) + Cos^2 (356) + Cos^2 (358) + Cos^2 (360) Thanks in advance.
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Originally Posted by JohnLord123 Find the sum: Cos^2 (0) + Cos^2 (2) + Cos^2 (4) + Cos^2 (356) + Cos^2 (358) + Cos^2 (360) Thanks in advance. 1. I assume that the argument of the trigonometric functions is in degree (?). 2. You can simplify the given term a little bit: Since you'll get: Since the term simplifies to:
Last edited by earboth; Aug 23rd 2010 at 12:32 PM. Reason: removed a typo
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