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If A+B+C=(pi)/(2) prove that:m (i) "ta...

If A+B+C=`(pi)/(2)` prove that:m
(i) `"tan"A tan B +"tan"B tan C +"tan" C tan A =1`
(ii) `cot A +cot B+ cot C= cot A cot B cot C.`

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