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If p1, p2, p3 are the altitudes of ∆ABC, then show that 1/p21 + 1/p22 + 1/p23 = (Cot A + Cot B + Cot C)/∆

+2 votes

asked Mar 19, 2019 in JEE by kratos

If p1, p2, p3 are the altitudes of ∆ABC, then show that

1/p21 + 1/p22 + 1/p23 = (Cot A + Cot B + Cot C)/∆

straight lines
properties of triangles
class-11
jee
relations and functions
jee mains
class-12
triangle

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1 Answer

+2 votes

answered Jan 14, 2021 by kratos

Best answer

Given P1, P2, P3 are the altitudes of ∆ABC

From (1) & (2)

L.H. = R.H.

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