Trig Formulas and Identities

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Math

A-Level Mathematics

Edexcel

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21 Terms

1
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tan(x)

sin(x)

cos(x)

2
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cot(x)

cos(x)

sin(x)

3
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cosec(x)

1

sin(x)

4
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sin(x)

1

cosec(x)

5
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sec(x)

1

cos(x)

6
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cos(x)

1

sec(x)

7
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cot(x)

1

tan(x)

8
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tan(x)

1

cot(x)

9
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sin2(x) +cos2(x)

1

10
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tan2(x) + 1

sec2(x)

11
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1 + cot2(x)

cosec2(x)

12
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sin(2x)

2sin(x)cos(x)

13
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cos(2x)

cos2(x) - sin2(x)

2cos2(x) - 1

1 - 2sin2(x)

14
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tan(2x)

2tan(x)

1 - tan2(x)

15
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sin(A + B)

sinAcosB + cosAsinB

16
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sin(A + A)

sinAcosA + cosAsinA

17
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cos(A + B)

cosAcosB - sinAsinB

18
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cos(A + A)

cosAcosA - sinAsinA

19
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tan(A + B)

tanA + tanB

1 - tanAtanB

20
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tan(A + A)

tanA + tanA

1 - tanAtanA

21
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tan(2A)

2tanA

1 - tan2A