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Trigonometry Identity: Proof that sin^2(x) + cos^2(x) = 1

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Trigonometry Identity: Proof that sin^2(x) + cos^2(x) = 1

A simple proof of the very important and useful trigonometry Identity sin^2(x) + cos^2(x) = 1 is shown. Also the notation for squaring trigonometric functions is shown. Since the proof requires the use of the Pythagorean theorem, this identity is called the Pythagorean trigonometric identity. Video Notes: - PDF: https://1drv.ms/b/s ...

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