trig identities

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8 Terms

1
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sin²x

1 − cos²x

2
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cos²x

1 − sin²x

3
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sec²x

1 + tan²x

4
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tan²x

sec²x − 1

5
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csc²x

1 + cot²x

6
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cot²x

csc²x − 1

7
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sin²x half

(1 − cos 2x) / 2

8
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cos²x half

(1 + cos 2x) / 2