Trig formulas
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18 Terms
1
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sin(x+y)
sinXcosY + sinYcosX
2
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sin(x-y)
sinXcosY - sinYcosX
3
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cos(x+y)
cosXcosY -sinXsinY
4
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cos(x-y)
cosXcosY + sinXsinY
5
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tan(x+y)
(tanX + tanY)/(1 - tanXtanY)
6
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tan(x-y)
(tanX - tanY)/(1 + tanXtanY)
7
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sin(2x)
2sinXcosX
8
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cos(2x)
2cos²X - 1
1 - 2sin²X
9
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tan(2x)
(2tanX)/(1 - tan²X)
10
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cos²θ + sin²θ
1
11
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sin²θ
1 - cos²θ
12
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cos²θ
1 - sin²θ
13
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tanθ
sinθ/cosθ
14
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sinθ
tanθcosθ
15
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cosθ
sinθ/tanθ
16
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cscθ
1/sinθ
17
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secθ
1/cosθ
18
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cotθ
1/tanθ
cosθ/sinθ
Note 
Flashcards (71)