trigo identities

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Last updated 6:38 AM on 7/21/26

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6 Terms

1

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sin²x + cos²x

1

2

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tan²x + 1

sec²x

3

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1 + cot²x

cosec²x

4

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sin(2x)

2sinxcosx

5

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cos(2x)

cos²x - sin²x OR 2cos²x - 1 OR 1 - 2sin²x

6

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tan(2x)

2tanx/(1-tan²x)