1.

Ifp_1, p_2, p_3arethe lengthsof the altitudesfromthe verticesofDelta ABCto the oppositesides,then( a cot A)/(p_1) + ( b cot B)/( p_2)+( c cot C)/(p_3)=

Answer»

` (1)/ ( R ) `
` (1)/( R) `
` (1)/( r^(3))`
` 2`

ANSWER :D


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