Summary of Trig Values for 1st Quadrant and Quadrantal Angles
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42 Terms
1
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sin π/6
1/2
2
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cos π/6
√3/2
3
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tan π/6
√3/3
4
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csc π/6
2
5
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sec π/6
2√3/3 or 1/(√3/2)
6
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cot π/6
√3
7
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sin π/4
√2/2
8
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cos π/4
√2/2
9
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tan π/4
1
10
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csc π/4
√2 or 1/(√2/2)
11
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sec π/4
√2 or 1/(√2/2)
12
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cot π/4
1
13
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sin π/3
√3/2
14
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cos π/3
1/2
15
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tan π/3
√3
16
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csc π/3`
2√3/3 or 1/(√3/2)
17
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sec π/3
2
18
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cot π/3
√3/3
19
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sin π/2
1
20
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cos π/2
0
21
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tan π/2
not defined
22
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csc π/2
1
23
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sec π/2
not defined
24
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cot π/2
0
25
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sin π
0
26
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cos π
-1
27
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tan π
0
28
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csc π
not defined
29
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sec π
-1
30
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cot π
not defined
31
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sin 0
0
32
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cos 0
1
33
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tan 0
0
34
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csc 0
not defined
35
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sec 0
1
36
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cot 0
not defined
37
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sin 3π/2
-1
38
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cos 3π/2
0
39
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tan 3π/2
not defined
40
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csc 3π/2
-1
41
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sec 3π/2
not defined
42
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cot 3π/2
0