Analiza

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Question		Answer
cos(A)cos(B) start learning		1/2(cos(A-B)+cos(A+B))
sin(A)sin(B) start learning		1/2(cos(A-B)-cos(A+B))
sin(A)cos(B) start learning		1/2(sin(A-B)+sin(A+B))
sin(A+B) start learning		sin(A)cos(B)+sin(B)cos(A)
sin(A-B) start learning		sin(A)cos(B)-sin(B)cos(A)
cos(A+B) start learning		cos(A)cos(B)-sin(B)sin(A)
cos(A-B) start learning		cos(A)cos(B)+sin(B)sin(A)

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