cot A + tan B/cot B + tan A = cot A× tan B
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Answer:-
LHS:-
=>cot A + tan B/ cot B tan A
=>(cot A +1/ cot B)/( cot B +1/ cot A )
=>cot A cot B +1/ cot B /( cot A cot B +1)/ cot A
=>cot A/ cot B
=>cot A tan B
=>RHS...
hence proved
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