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IF p1,p2,p3 are the lengths of the altit...

IF `p_1,p_2,p_3` are the lengths of the altitudes of a triangle from the vertices A,B,C then `1//p_2^1+1//p_2^2+1//p_3^2=`

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The correct Answer is:
`(1)/( Delta ) ( cot A + cot B+ cot C = ` R.H.S.
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