If (x sinθ) = (y cosθ) = (2z tanθ) / (1 - tan2θ), then what is 4z2 – McqOptions

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1.	If (x sinθ) = (y cosθ) = (2z tanθ) / (1 - tan2θ), then what is 4z2 (x2 + y2) equal to?
A.	(x2 + y2)3
B.	(x2 - y2)2
C.	(x2 - y2)3
D.	(x2 + y2)2
Answer» C. (x2 - y2)3

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