Product-to-Sum and Sum-to-Product Formulas
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8 Terms
1
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sin(A)·sin(B)
½[cos(A − B) − cos(A + B)]
2
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cos(A)·cos(B)
½[cos(A − B) + cos(A + B)]
3
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sin(A)·cos(B)
½[sin(A + B) + sin(A − B)]
4
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cos(A)·sin(B)
½[sin(A + B) − sin(A − B)]
5
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sin(A) + sin(B)
2·sin[(A + B)/2]·cos[(A − B)/2]
6
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sin(A) − sin(B)
2·cos[(A + B)/2]·sin[(A − B)/2]
7
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cos(A) + cos(B)
2·cos[(A + B)/2]·cos[(A − B)/2]
8
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cos(A) − cos(B)
−2·sin[(A + B)/2]·sin[(A − B)/2]
Note 
Flashcards (33)