Power Reduction Identities and Pythagorean Identities

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Last updated 1:34 PM on 8/21/26
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5 Terms

1
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sin²θ =

1-cos2θ/2

2
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cos²θ =

1+cos2θ/2

3
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___²θ + ___²θ = ___

sin²θ + cos²θ = 1

4
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___²θ + ___ = ___²θ

tan²θ + 1 = sec²θ

5
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___ + ___²θ = ___2θ

1 + cot²θ = csc²θ