Sum and Difference Identities Flashcards

0
Q

cos(a-b)

A

cos(a)cos(b)+sin(a)sin(b)

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1
Q

cos(a+b)

A

cos(a)cos(b)-sin(a)sin(b)

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2
Q

sin(a+b)

A

sin(a)cos(b)+cos(a)sin(b)

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3
Q

sin(a-b)

A

sin(a)cos(b)-cos(a)sin(b)

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4
Q

tan(a+b)

A

(tan(a)+tan(b))/(1-tan(a)tan(b))

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5
Q

tan(a-b)

A

(tan(a)-tan(b))/(1+tan(a)tan(b))

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