cos(α + β) + cos(α - β)/sin(α + β) + sin(α - β) = – McqOptions

MCQOPTIONS

1.	cos(α + β) + cos(α - β)/sin(α + β) + sin(α - β) =
A.	sin2α-cos2β
B.	−cotα
C.	cotα
D.	tanα
Answer» D. tanα

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