Trig Identities

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31 Terms

1
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Sin x

1/csc x

2
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csc x

1/sin x

3
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cos x

1/ sec x

4
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sec x

1/cos x

5
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tan x 

1/cot x 

6
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cot x

1/ tan x 

7
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tan x

sin x/cos x

8
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Cot x

cos x/sin x

9
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sin² x +cos ² x =

1

10
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Tan² x+1=

sec²

11
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1+cot² x =

csc² 

12
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Sin (pie/2 - x) =

cos x 

13
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Cot(pie/2 -x)=

tan x

14
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Cos(pie/2 -x) =

sin x

15
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sec (pie/2 - x)=

csc x

16
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tan(pie/2 - x)=

cot x

17
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csc(pie/2-x)=

sec x

18
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sin(-x)

-sin x 

19
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Csc(-x)

-csc x

20
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Cos(-x)

cos x

21
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sec(-x)

sec x

22
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tan(-x)

-tan x

23
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cot(-x)

-cot x

24
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sin(u+v) =

sin u cos v + sin v cos u

25
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cos(u+v)=

cos u cos v + sin u sin v

26
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tan(u+v)=

tan u + tan v/ 1 + tan u tan v

27
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Sin2u =

2 sin u cos u

28
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Tan2u=

2 tan u/ 1-tan² u

29
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Cos2u=

cos² u - sin² u

30
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Cos2u=

1-2sin² u

31
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Cos2u=

2 cos² u -1