If tan A + tan B = a and cot A + cot B = b, then 1/a - 1/b is equal to – McqOptions

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1.	If tan A + tan B = a and cot A + cot B = b, then 1/a - 1/b is equal to ____.
A.	tan(A + B)
B.	cos(A + B)
C.	sin(A + B)
D.	cot(A + B)
Answer» E.

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