Trigonometric Identities

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12 Terms

1
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sin(-x)

-sin(x)

2
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cos(-x)

cos(x)

3
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1

sin²(x)+cos²(x)

4
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1

sec²(x) - tan²(x)

5
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1

csc²(x)-cot²(x)

6
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sin(a+-b)

sin(a)cos(b) +- cos(a)sin(b)

7
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cos(a+-b)

cos(a)cos(b)-+sin(a)sin(b)

8
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sin(2x)

2sin(x)cos(x)

9
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cos(2x)

cos²(x)-sin²(x)

10
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cos(2x)

2cos²(x)-1

11
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cos(2x)

1-2sin(x)

12
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tan(2x)

2tan(x)/1-tan²(x)