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Bài 1: Giá trị lượng giác của góc lượng giác
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22 Terms
1
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sin2∝ + cos2∝ =
1
2
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tan∝ =
sin∝ / cos∝
3
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cot∝ =
cos∝ / sin∝
4
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tan∝ . cot∝ =
1
5
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cos(-∝) =
cos∝
6
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sin(-∝) =
-sin∝
7
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tan(-∝) =
-tan∝
8
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cot(-∝) =
-cot∝
9
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sin(π-∝) =
sin∝
10
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cos(π-∝) =
-cos∝
11
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tan(π-∝) =
-tan∝
12
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cot(π-∝) =
-cot∝
13
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sin(π/2 - ∝) =
cos∝
14
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cos(π/2 - ∝) =
sin∝
15
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tan(π/2 - ∝) =
cot∝
16
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cot(π/2 - ∝) =
tan∝
17
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sin(π/2 + ∝) =
-sin∝
18
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cos(π/2 + ∝) =
-cos∝
19
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tan(π/2 + ∝) =
tan∝
20
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cot(π/2 + ∝)
cot∝
21
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1 + tan2∝ =
1/cos2∝
22
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1 + cot2∝ =
1/sin2∝