# Unit circle proof

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1) Prove from the unit circle that sin²⊖ + cos²⊖ = 1. Using the result describe the equation for which x = 3 + 2cos⊖, y = 1 + 3sin⊖.

2) Using problem one simplify sin²⊖/(1 + cos⊖) + sin²⊖/(1 - cos⊖)

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##### Solution Summary

This uses the unit circle in a proof, and uses the proof to solve a trigonometric equation.

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