Trigonometric Identities

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Flashcards of trigonometric identities

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17 Terms

1
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csc θ =

1 / sin θ

2
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sec θ =

1 / cos θ

3
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tan θ =

sin θ / cos θ

4
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cot θ =

cos θ / sin θ

5
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cos²θ + sin²θ =

1

6
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1 - cos²θ =

sin²θ

7
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1 - sin²θ =

cos²θ

8
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1 + tan²θ =

sec²θ

9
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sec²θ - 1 =

tan²θ

10
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1 - sec²θ =

- tan²θ

11
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1 + cot²θ =

csc²θ

12
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csc²θ - 1 =

cot²θ

13
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1 - csc²θ =

-cot²θ

14
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cot θ =

1/ tan θ

15
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csc θ =

1/sin θ

16
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tan θ =

1/ cot θ

17
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sin θ =

1/csc θ