double angle identities

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10 Terms

1
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sin(2θ) = 2sinθcosθ

sin double angle identity

2
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sin(2θ) = 2sinθcosθ

sin(2θ) = 2sinθcosθ

3
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cos(2θ) = 2cos²θ - 1

cos double angle identity (just cos)

4
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cos(2θ) = 2cos²θ - 1

cos(2θ) = 2cos²θ - 1

5
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cos(2θ) = cos²θ - sin²θ

cos double angle identity (cos and sin)

6
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cos(2θ) = cos²θ - sin²θ

cos(2θ) = cos²θ - sin²θ

7
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cos(2θ) = 1 - 2sin²θ

cos double angle identity (just sin)

8
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cos(2θ) = 1 - 2sin²θ

cos(2θ) = 1 - 2sin²θ

9
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tan(2θ) = 2tanθ / 1-tan²θ

tan double angle identity

10
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tan(2θ) = 2tanθ / 1-tan²θ

tan(2θ) = 2tanθ / 1-tan²θ