Trig Identities

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21 Terms

1
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sin (x)

1/csc (x)

2
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cos (x)

1/sec (x)

3
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tan

1/cot (x), sin (x)/cos (x)

4
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cot (x)

1/tan (x), cos (x)/sin(x)

5
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sec (x)

1/cos (x)

6
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csc (x)

1/sin(x)

7
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sin² (x) + cos² (x) =

1

8
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tan² (x) + 1 =

sec² (x)

9
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1 + cot² (x) =

csc² (x)

10
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sin² (x) =

1 - cos² (x)

11
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cos² (x) =

1 - sin² (x)

12
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tan² (x) =

1 - sec² (x)

13
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sec² (x) - tan² (x) =

1

14
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csc² (x) - cot² (x) =

1

15
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cot² (x) =

csc² (x) - 1

16
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sin (-x)

-sin (x)

17
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csc (-x)

-csc (x)

18
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cos (-x)

cos (x)

19
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sec (-x)

sec (x)

20
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tan (-x)

-tan (x)

21
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cot (-x)

-cot (x)