Преобразование суммы и разности в произведение Flashcards by Peter Timofeev | Brainscape

Q

sinA+-sinB=

A

2sin(A+-B/2)cos(A-+B/2)

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Q

cosA+cosB=

A

2cos(A+B/2)cos(A-B/2)

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Q

cosA-cosB=

A

-2sin(A+B/2)Sin(A-B/2)

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