Product To Sum Flashcards by KJ Smith | Brainscape

Q

Cos a • Cos b =

A

½[Cos(a-b) + Cos(a+b)]

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Q

Sin a • Sin b =

A

½[Cos(a-b) - Cos(a+b)]

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Q

Sin a • Cos b

A

½[Sin(a-b) + Sin(a+b)]

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