If `p_(1),p_(2),p_(3)` are the altitudes of a triangle
Channel: Doubtnut
Date: 2019-12-29

If `p_(1),p_(2),p_(3)` are the altitudes of a triangle from the vertieces A,B,C and `Delta` is the area of the triangle then prove that `(1)/(p_(1))+(1)/(p_(2))-(1)/(p_(3))=(2ab)/((a+b+c)Delta)\"cos\"^(2)(C)/(2)`