trig identities
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Last updated 5:20 PM on 1/4/26
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23 Terms
1
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Pythagorean identity involving sin
sin² 0 + cos² 0 = 1
2
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Pythagorean identity involving tangent
tan² 0 + 1 = sec² 0
3
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Pythagorean identity involving cotangent
cot² 0 + 1 = csc² 0
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sin 0 =
1/csc 0
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cos 0 =
1/sec 0
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tan 0 =
1/cot 0
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csc 0 =
1/sin 0
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sec 0 =
1/cos 0
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cot 0 =
1/tan 0
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(q) tan 0 =
sin 0/cos 0
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(q) cot 0 =
cos 0/sin 0
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sin (-0)
-sin 0
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csc (-0)
-csc 0
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cos (-0)
cos 0
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sec (-0)
sec 0
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tan (-0)
-tan 0
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cot (-0)
-cot 0
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sin(π/2 - 0) =
cos 0
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cos(π/2 - 0) =
sin 0
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sec(π/2 - 0) =
csc 0
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csc(π/2 - 0) =
sec 0
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tan(π/2 - 0) =
cot 0
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cot(π/2 - 0) =
tan 0
Note 
Flashcards (28)