Double-Angle Identities Flashcards by Madeline Barros | Brainscape

Q

cos2x=

A

cos^2(x)-sin^2(x)

2cos^2(x)-1

1-2sin^2(x)

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Q

sin2x=

A

2sin(x)cos(x)

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Q

tan2x=

A

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

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