trig identities

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10 Terms

1
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sin(A+B)

sinAcosB+cosAsinB

2
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sin(A-B)

sinAcosB-cosAsinB

3
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sin2A

2sinAcosA

4
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cos(A+B)

cosAcosB-sinAsinB

5
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cos(A-B)

cosAcosB+sinAsinB

6
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cos2A

  1. cos²A-sin²A

  2. 2cos²A-1

  3. 1-2sin²A


7
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tan(A+B)

tanA+TanB/1-tanAtanB

8
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tan(A-B)

tanA-tanB/1+tanAtanB

9
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tan2a

2tanA/1-tan²A

10
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sin²a+cos²a=1

pythagorean identity