trigonometry - Easy way of memorizing values of sine, cosine, and tangent - Mathematics Stack Exchange

My math professor recently told us that she wanted us to be able to answer $\sin\left(\frac{\pi }{2}\right)$ in our head on the snap. I know I can simply memorize the table for the test by this Fri

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trigonometry - Easy way of memorizing values of sine, cosine, and

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