plz give me the ans.
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1/( cot A+ TanB) = TanA/( tan tan b +1)
1/TanA + cot B = TanB/tan tanb +1
so 1/(CotA+ TanB) - 1/(TanA+ cot B) = (TanA-Tanb)/1+ TanA Tanb
= tan( a-b)
1/TanA + cot B = TanB/tan tanb +1
so 1/(CotA+ TanB) - 1/(TanA+ cot B) = (TanA-Tanb)/1+ TanA Tanb
= tan( a-b)
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