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For any angles A and B, sin(A + B) equals

AsinA sinB + cosA cosB
BsinA cosB − cosA sinB
CsinA cosB + cosA sinB
DcosA cosB − sinA sinB
Answer & Solution
Correct answer: C. sinA cosB + cosA sinB
The sum formula for sine adds the two cross products, sinA cosB and cosA sinB.
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