Trig Formulas and Identities
5.0(1)
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Last updated 5:07 PM on 1/13/26
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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
