3.12 AP PreCalc
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Last updated 6:41 PM on 3/16/26
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15 Terms
1
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sin2x+cos2x = 1
pythagorean identity
2
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1-cos2x
sin2x
3
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1-sin2x
cos2x
4
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1+cot2x
csc2x
5
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csc2x-1
cot2x
6
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tan2x+1
sec2x
7
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sec2x-1
tan2x
8
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sin(a+b)
sina cosb + cosa sinb
9
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sin(a-b)
sina cosb - cosa sinb
10
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cos(a+b)
cosa cosb - sina sinb
11
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cos(a-b)
cosa cosb + sina sinb
12
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sin(2a)
2sinacosa
13
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cos(2a) #1
cos2a - sin2a
14
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cos(2a) #2
2cos2a - 1
15
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cos(2a) #3
1 - 2sin2a
