Trig identities
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21 Terms
1
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sin(90-θ)=
cosθ
2
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sec(90-θ)=
cscθ
3
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tan(90-θ)=
cotθ
4
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cos(90-θ)=
sinθ
5
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csc(90-θ)=
secθ
6
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cot(90-θ)=
tanθ
7
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sin(π/2 - θ)=
cosθ
8
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sec(π/2 - θ)=
cscθ
9
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tan(π/2 - θ)=
cotθ
10
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cos(π/2 - θ)=
sinθ
11
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csc(π/2 - θ)=
secθ
12
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cot(π/2 - θ)=
tanθ
13
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sin²θ+cos²θ=
1
14
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tan²θ+1=
sec²θ
15
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cot²θ+1=
csc²θ
16
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cos(-t)=
cos t
17
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sec(-t)=
sec t
18
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sin(-t)=
-sin t
19
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csc(-t)=
-csc t
20
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tan(-t)=
-tan t
21
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cot(-t)=
-cot t
Note 
Flashcards (160)