Trigonometric Identities (Double-angle identities) Flashcards by Rolein Nicole A. Parco | Brainscape

Q

sin2u

A

2sinucosu

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Q

cos2u

A

cos^2u-sin^2u or 2cos^2u-1 or 1-2sin^2u

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Q

tan2u

A

2tanu/1-tan^2u

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