10.2.2 Double-Angle Identities

10.2.2 Double-Angle Identities - Double-Angle Identities...

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Unformatted text preview: Double-Angle Identities Double-Angle Section 10.2.2 Double Angle Identities Double sin 2 x = 2sin x cos x cos 2 x = cos x − sin x 2 cos 2 x = 2 cos x − 1 2 cos 2 x = 1 − 2sin x 2 2 2 tan x tan 2 x = 2 1 − tan x Joke Time Joke Why do bees have sticky hair? Because they have honeycombs! What goes Oh! Oh! Oh!? Santa Clause walking backwards ...
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