Trig Identities

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21 Terms

1
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sinx=

1/cscx

2
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cscx

1/sinx

3
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cosx

1/secx

4
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secx

1/cosx

5
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tanx

1/cotx

6
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tanx

sinx/cosx

7
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cotx

1/tanx

8
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cotx

cosx/sinx

9
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sin²x+cos²x

1

10
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1+tan²x

sec²x

11
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1+cot²x

csc²x

12
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sin(a+b)

sinacosb+cosasinb

13
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sin(a-b)

sinacosb-cosasinb

14
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cos(a+b)

cosacosb-sinasinb

15
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cos(a-b)

cosacosb+sinasinb

16
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sin(2x)

2sinxcosx

17
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cos²x-sin²x

cos(2x)

18
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1-2sin²x

cos(2x)

19
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2cos²x-1

cos(2x)

20
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arccosx

arcsin(1-x²)1/2

21
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arcsin

arccos(1-x²)1/2