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→ Sin(A+45°)sin(A-45°) =

1.	Sin(A+45°)sin(A-45°) =
A.	−1/2cos(2A)
B.	−1/2sin(2A)
C.	−1/2sin(2A)
D.	None of Above
Answer» B. −1/2sin(2A)

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