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anonymous
 4 years ago
Why would knowing the Pythagorean Identity sin^x + cos^x =1 and the sum identities allow you to prove all the other identities (sum and difference, double angle, half angle, squared identities, product to sum) you have seen in this lesson?
anonymous
 4 years ago
Why would knowing the Pythagorean Identity sin^x + cos^x =1 and the sum identities allow you to prove all the other identities (sum and difference, double angle, half angle, squared identities, product to sum) you have seen in this lesson?

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UnkleRhaukus
 4 years ago
Best ResponseYou've already chosen the best response.0you mean of course \[sin^2x+cos^2x=1\]
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