If P_(1),P_(2),P_(3) are the altitudes of the DeltaABCthen , show that – InterviewSolution

1.	If P_(1),P_(2),P_(3) are the altitudes of the DeltaABCthen , show that (1)/(P_(1)^(2))+(1)/(P_(2)^(2))+(1)/(P_(3)^(2))=(cotA+cotB+cotC)/(Delta)
Answer» `(2AB cos^(2)C//2)/(DELTA(a+b+c))` `(1)/(R)` `(cotA+cotB+cotC)/(Delta)` 2R Answer :C

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