Maths Trig Identities A-Level Edexcel
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13 Terms
1
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sin(A±B)
sinAcosB±cosAsinB
2
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cos(A±B)
cosAcosB∓sinAsinB
3
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tan(A±B)
tanA±tanB÷(1∓tanAtanB)
4
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tanθ
sinθ÷cosθ
5
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cotθ
cosθ÷sinθ
1÷tanθ
1÷tanθ
6
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secθ
1÷cosθ
7
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cosecθ
1÷sinθ
8
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sin²θ+cos²θ
1
9
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tan²θ+1
sec²θ
10
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cot²θ+1
cosec²θ
11
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sin2θ
2sinθcosθ
12
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cos2θ
cos²θ-sin²θ
2cos²θ-1
1-2sin²θ
2cos²θ-1
1-2sin²θ
13
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tan2θ
2tanθ÷(1-tan²θ)
Note 
Flashcards (26)