If `p_1, p_2, p_3`, be the altitudes of a triangle ABC from the vertices A, B, C respectively and `Delta` be the area of the triangle ABC, prove that : `p/p_1 + 1/p_2 - 1/p_3 = (2ab cos^2, C/2)/(Delta (a+b+c))`

If P_1, P_2 and P_3 are the altitudes of a triangle from vertices A, B and C respectively and Delta is the area of the triangle, then the value of 1/P_1+1/P_2-1/P_3=

If p_(1), p_(2) and p_(3) are the altitudes of a triangle from the vertices of a Delta ABC and Delta is the area of triangle, prove that : (1)/(p_(1)) + (1)/(p_(2)) - (1)/(p_(3)) = (2ab)/((a+b+c)Delta) cos^(2).(C )/(2)

If p_(1),p_(2),p_(3) are altitudes of a triangle ABC from the vertices A,B,C and ! the area of the triangle, then p_(1).p_(2),p_(3) is equal to

If p_(1),p_(2),p_(3) are the altitues 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)

P_(1), P_(2), P_(3) are altitudes of a triangle ABC from the vertices A, B, C and Delta is the area of the triangle, The value of P_(1)^(-1) + P_(2)^(-1) + P_(3)^(-1) is equal to-

If p_(1),p_(2),p_(3) are altitudes of a triangle ABC from the vertices A,B,C and triangle the area of the triangle, then p_(1)^(-2)+p_(2)^(-2)+p_(3)^(-2) is equal to

If p_1,p_2,p_3 re the altitudes of the triangle ABC from the vertices A, B and C respectivel. Prove that (cosA)/p_1+(cosB)/p^2+(cosC)/p_3 =1/R

In a triangle A B C , if cos A+2\ cos B+cos C=2. prove that the sides of the triangle are in A.P.

Find the equation of the altitudes of triangle ABC whose vertices are A(2,-2), B(1,1) and C(-1,0)

In a triangle ABC , the sides a , b , c are in G.P., then the maximum value of angleB is