Pre Calculus - Trig Identities
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34 Terms
1
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sin(x)
1/csc(x)
2
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cos(x)
1/sec(x)
3
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tan(x)
1/cot(x)
4
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csc(x)
1/sin(x)
5
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sec(x)
1/cos(x)
6
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cot(x)
1/tan(x)
7
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tan(x)
sin(x)/cos(x)
8
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cot(x)
cos(x)/sin(x)
9
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cos(x)²+sin(x)²
1
10
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1+cot(x)²
csc(x)²
11
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sec(x)²-tan(x)²
1
12
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tan(-x)
-tan(x)
13
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cot(-x)
-cot(x)
14
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sin(-x)
-sin(x)
15
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csc(-x)
-csc(x)
16
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cos(-x)
cos(x)
17
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sec(-x)
sec(x)
18
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sin(x)
cos(pi/2-x)
19
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cos(x)
sin(pi/2-x)
20
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tan(x)
cot(pi/2-x)
21
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cot(x)
tan(pi/2-x)
22
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sec(x)
csc(pi/2-0)
23
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csc(x)
sec(pi/2-x)
24
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cos(A+B)
cosAcosB-sinAsinB
25
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cos(A-B)
cosAcosB+sinAsinB
26
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sin(A+B)
sinAcosB+cosAsinB
27
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sin(A-B)
sinAcosB-cosAsinB
28
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tan(A+B)
tanA+tanB/1-tanAtanB
29
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tan(A-B)
tanA-tanB/1+tanAtanB
30
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sin(2x)
2sin(x)cos(x)
31
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cos(2x)
cos(x)²-sin(x)²
32
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cos(2x)
1-2sin(x)²
33
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cos(2x)
2cos(x)²-1
34
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tan(2x)
2tan(x)/1-tan(x)²
Note 
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