[" If "alpha,beta,gamma" are the lengths of internal bisectors of angles "A" ,"],[" B,C respectively of "/_ABC" ,then "sum(1)/(alpha)cos(A)/(2)=]

If alpha,beta,gamma are lengths of internal bisectors of angles A,B,C respectively of Delta ABC, then sum(1)/(alpha)cos((A)/(2)) is

If alpha, beta, gamma are lenghts of internal bisectors of angles A,B,C respectively of DeltaABC , then sum (1)/(alpha) "cos" (A)/(2) is

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 (cos A)/(alpha)+(cos B)/(beta)+(cos C)/(gamma)=

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 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 direction angles of a vector and cos alpha=(14)/(15), cos beta=(1)/(3) , then cos gamma=

If alpha,beta, gamma are the direction angles of a vector and cos alpha=(14)/(15), cos beta=(1)/(3) , then cos gamma=

If alpha,beta ,gamma are direction angles of a line , then cos 2alpha + cos 2beta + cos 2 gamma =