Double Angle Formulas Flashcards by Spencer Tuft | Brainscape

Q

cos(2u) = ? (3 Formulas!)

A

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

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Q

sin(2u) = ?

A

2 (sin u)(cos u)

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Q

Tan(2u) = ?

A

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

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