Trignometric Identities

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Description and Tags

The ones that aren't given in the formula book

Math

A-Level Mathematics

AQA

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6 Terms

1
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Sin2A

2SinACosA

2
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Cos2A

Cos²A - Sin²A

or

2Cos²A - 1

or

1 - 2sin²A

3
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Tan2A

(2TanA)

(1 - Tan²A)

4
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Sin²x + Cos²x =

1

5
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Sec²x =

Tan²x + 1

6
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Cosec²x =

1 + Cot²x