If tan A - tan B = x and cot B - cot A = y, then what is the value of – McqOptions

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1.	If tan A - tan B = x and cot B - cot A = y, then what is the value of cot (A - B)?
A.	\(\frac{1}{x}+\frac{1}{y}\)
B.	\(\frac{1}{y}-\frac{1}{x}\)
C.	\(\frac{xy}{x+y}\)
D.	\(1+\frac{1}{xy}\)
Answer» B. \(\frac{1}{y}-\frac{1}{x}\)

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