Trigonometry identities
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12 Terms
1
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Sin2 x + Cos2 x =
1
2
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Cos2 x =
1 - Sin2 x
3
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Sin2 x =
1 - Cos2 x
4
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Sin (x) / Cos (x)
Tan (x)
5
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Tan2 x +1 =
sec2 x
6
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Tan2 x =
sec2 x -1
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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Sec x =
1 / Cos x
10
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Cosec x =
1 / Sin x
11
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1 + Cot2 x =
cosec2 x
12
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2(Sin x)(Cos x) =
sin 2x
Note 
Flashcards (45)