Trig Identities

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9 Terms

1
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sin^2x + cos^2x

1

2
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1 + tan^2x

sec^2x

3
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1 + cot^2x

csc^2x

4
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sin2x

2sinxcosx

5
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cos2x

cos^2x - sin^2x

6
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sin^2x

1/2(1-cos(2x))

7
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cos^2x

1/2(1+cos(2x))

8
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tan^2x

sec^2x - 1

9
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cot^2x

csc^2x - 1