Trigonometry Identities
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11 Terms
1
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sin²x + cos²x
1
2
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1 + tan²x
sec²x
3
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1 + cot²x
csc²x
4
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sin(u ± v)
sinu cosv ± cosu sinv
5
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cos(u ± v)
cosu cosv ∓ sinu sinv
6
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sin2x
2sinx cosx
7
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cos2x
cos²x - sin²x
8
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cos2x
2cos²x - 1
9
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cos2x
1 - 2sin²x
10
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sin²x
(1-cos2x)/2
11
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cos²x
(1+cos2x)/2