If `alpha,beta, gamma` are the lengths of altitudes of `Delta ABC`, then `alpha^-2+ beta^-2+ gamma^-2`=

If alpha, beta , gamma are the lengths of the altitudes of Delta ABC , " then " alpha ^(-2) +beta ^(-2) +gamma^(-2) =

IF alpha,beta,gamma are the lengths of the altitudes of Delta ABC , then 1/alpha+1/beta-1/gamma-(2ab)/((a+b+c)Delta)cos^2""C/2=

If alpha,beta,gamma are the lengths of the altitudes of Delta ABC , then cosA/alpha+cosB/beta+cosC/gamma=

If alpha,beta,gamma are the lengths of the altitudes of Delta ABC, then (cos A)/(alpha)+(cos B)/(beta)+(cos C)/(gamma)=

If alpha, beta , gamma lengths of the altitudes of a triangle ABC, prove that alpha^(-2)+ beta^(-2) + gamma^(-2)=(1)/(Delta)( cot A+ cot B+cotC) , where Delta is the area of the triangle.

If alpha,beta,gamma , are lengths of the altitudes of a triangle ABC with area Delta , then Delta^2/R^2(1/alpha^2+1/beta^2+1/gamma^2)=

If alpha,beta,gamma are lengths of the altitudes of a triangle ABC with area Delta, then (Delta^(2))/(R^(2))((1)/(alpha^(2))+(1)/(beta^(2))+(1)/(gamma^(2)))=

If alpha, beta and gamma are the lengths of altitudes ABC and Delta be its area prove that : (1)/(alpha^(2))+(1)/(beta^(2)) + (1)/(gamma^(2)) = ((cot A + cot B + cot C))/(Delta)

If alpha, beta, gamma are the roots of x^3+a x^2+b=0 then the value of [[alpha , beta , gamma],[beta , gamma , alpha],[gamma , alpha , beta]] is