Thursday, June 1, 2017

algebra precalculus - Sine/cosine series

$$\frac{\sin²(1°) + \sin²(2°) + \sin²(3°) + .. + \sin²(90°)}{\cos²(1°) + \cos²(2°) + \cos²(3°) + .. + \cos²(90°)} = ?$$


I tried to use multiple identities but I couldn't simplify the expression. Where should I start?

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