Double-Angle + Sum and Difference Identities

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Pre-Calculus

Last updated 4:33 AM on 3/4/24
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9 Terms

1
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sin2x

2sinx(cosx)

2
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cos2x

cos²x-sin²x

3
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cos2x

1-2sin²x

4
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cos2x

2cos²x-1

5
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tan2x

2tanx/1-tan²x

6
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sin(a+b)

sina(cosb)+-cosa(sinb)

7
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cos(a+b)

cosa(cosb)-+sina(sinb)

8
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tan (a+-b)

tana+tanb/1-tana(tanb)

9
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sin²x|+cos²x

1