If sinθ = (m2 – n2)/(m2 + n2) and 0 < θ < π/2, then what is the v – McqOptions

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1.	If sinθ = (m2 – n2)/(m2 + n2) and 0 < θ < π/2, then what is the value of cosθ?
A.	2mn/(m2 + n2)
B.	2mn/(m2 - n2)
C.	(m2 + n2)/2mn
D.	(m2 - n2)/2mn
Answer» B. 2mn/(m2 - n2)

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