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Mathematics, 28.04.2021 18:40 therealdest

1. Why would knowing the Pythagorean identity sin2x + cos²x = 1 and the sum identities allow you to prove all the other identities you have seen in this
lesson?

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1. Why would knowing the Pythagorean identity sin2x + cos²x = 1 and the sum identities allow you...

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