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Last updated 12:38 PM on 9/16/22
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15 Terms
1
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sin(90-x)
cosx
2
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csc(90-x)
secx
3
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tan(90-x)
cotx
4
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cos(A-B)
cosAcosB+sinAsinB
5
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sin(A+B)
sinAcosB+cosAsinB
6
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tan(A+B)
(tanA+tanB)/(1-tanAtanB)
7
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cos(A+B)
cosAcosB-sinAsinB
8
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sin(A-B)
sinAcosB-cosAsinB
9
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tan(A-B)
(tanA-tanB)/(1+tanAtanB)
10
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sin2x
2sinxcosx
11
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cos2x
cos^2x-sin^2x
12
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tan2x
(2tanx)/(1-tan^2x)
13
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sin(A/2)
+-√((1-cosA)/2)
14
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cos(A/2)
+-√((1+cosA)/2)
15
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tan(A/2)
+-√((1-cosA)/(1+cosA)
