Trig Identitites

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Description and Tags

Geometry & Trigonometry

12th

24 Terms

1
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sin²θ+cos²θ

1

2
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1+cot²θ

csc²θ

3
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tan²θ+1

sec²θ

4
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tanθ

sinθ/cosθ

5
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cotθ

cosθ/sinθ

6
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cscθ

1/sinθ

7
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secθ

1/cosθ

8
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cotθ

(reciprocal)

1/tanθ

9
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sin2θ

2sinθcosθ

10
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cos2θ

cos²θ-sins²θ

2cos²θ-1

1-sin²θ

11
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sin(90°-θ)

cosθ

12
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cos(90°-θ)

sinθ

13
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tan(90°-θ)

cotθ

14
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cot(90°-θ)

tanθ

15
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csc(90°-θ)

secθ

16
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sec(90°-θ)

cscθ

17
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sin(α±β)

sinαcosβ±cosαsinβ

18
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cos(α±β)

cosαcosβ∓sinαsinβ

19
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cos(-θ)

cosθ

20
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sec(-θ)

secθ

21
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sin(-θ)

-sinθ

22
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csc(-θ)

-cscθ

23
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tan(-θ)

-tanθ

24
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cot(-θ)

-cotθ