Double-Angle & Half Angle Flashcards by Nazrin Nazarudin | Brainscape

Q

sin 2ϴ

A

2 sin ϴ cos ϴ

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Q

cos 2ϴ (1st)

A

cos² ϴ - sin² ϴ

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Q

cos 2ϴ (2nd)

A

2 cos² ϴ - 1

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Q

cos 2ϴ (3rd)

A

1 - 2 sin² ϴ

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