Trig Identities
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Fundemntal trig identities
Last updated 3:38 PM on 3/31/26
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16 Terms
1
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sinθ
1/cscθ
2
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cscθ
1/sinθ
3
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cosθ
1/cosθ
4
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tanθ
1/cotθ
5
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cotθ
1/tanθ
6
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tanθ
sinθ/cosθ
7
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cotθ
cosθ/sinθ
8
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sin² θ+ cos² θ
=1
9
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1 + tan² θ
=sec² θ
10
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1 + cot² θ
csc² θ
11
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sin(-θ)
-sin θ
12
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cos(-θ)
cos θ
13
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tan (-θ)
-tan (θ)
14
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sin θ
tanθ/secθ
15
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cos θ
1/sec θ
16
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tanθ
1/cotθ
