Double Angle Formulas Flashcards by Ashton Mactavish | Brainscape

Q

sin(2a)

A

2sin(a)cos(a)

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Q

cos(2a)

A

cos^2 (a) - sin^2 (a)
2cos^2 (a) - 1
1 - 2sin^2 (a)

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Q

tan(2a)

A

2tan(a) / 1 - tan^2 (a)

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