Trig Identities

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23 Terms

1
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1/csc (u) =

sin (u)

2
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1/sec (u) =

cos (u)

3
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1/cot (u) =

tan (u)

4
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1/sin (u) =

csc (u)

5
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1/cos (u) =

sec (u)

6
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1/tan (u) =

cot (u)

7
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sin (x) / cos (x) =

tan (x)

8
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cos (α) / sin (α) =

cot (α)

9
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sin²(θ) + cos²(θ) =

1

10
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1 + tan²(x) =

sec²(x)

11
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1 + cot²(u) =

csc²(u)

12
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1 - cos²(u) =

sin²(u)

13
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1 - sin²(u) =

cos²(u)

14
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sec²(u) - 1 =

tan²(u)

15
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sin(Ď€/2 - u) =

cos(u)

16
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cos(Ď€/2 - u) =

sin(u)

17
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tan(Ď€/2 - u) =

cot(u)

18
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sin(-u) =

-sin(u)

19
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csc(-u) =

-csc(u)

20
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cos(-u) =

cos(u)

21
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sec(-u) =

sec(u)

22
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tan(-u) =

-tan(u)

23
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cot(-u) =

-cot(u)