Sum & Difference Formulas Flashcards by Dev Vyas

Q

sin(x+y) = ?

A

sinxcosy + sinycosx

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Q

sin(x-y) = ?

A

sinxcosy - sinycosx

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Q

cos(x+y) = ?

A

cosxcosy - sinxsiny

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Q

cos(x-y) = ?

A

cosxcosy + sinxsiny

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