Trigonometric Identities / Sum + Difference Identities / Double Angle Identities - AP Precalculus
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Last updated 6:39 PM on 3/19/25
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17 Terms
1
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sin ( u + v )
sin u cos v + cos u sin v
2
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sin ( u
v )
3
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cos ( u + v )
cos u cos v
4
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cos ( u
v )
5
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sin (2A)
2sin(A) cos(A)
6
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cos (2A) { Method 1 }
cos² (A)
7
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cos (2A) { Method 2 }
1
8
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cos (2A) { Method 3 }
2cos² (A)
9
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tan x
sin x/cos x
10
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cot x
cos x/sin x OR 1/tan x
11
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csc x
1/ sin x
12
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sec x
1/ cos x
13
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sin² x + cos²x =
1
14
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tan² x + 1 =
sec² x
15
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cot² x + 1 =
csc² x
16
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sin² x =
1
17
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cos²x =
1
Note 
Flashcards (33)