[" (2) "],[[" cos "^(2)alpha+cos^(2)beta+cos^(2)gamma+cos^(2)delta=(4)/(3)],[" Ans."]],[" Page "N_(0).193/Q." No."3]

If cos(alpha - beta) + cos(beta - gamma)+ cos(gamma-alpha)=-3/2 , then

If alpha+beta=gamma. then cos^(2)alpha+cos^(2)beta+cos^(2)gamma-2 cos alpha cos beta cos gamma=

A line makes angles alpha,beta,gamma and with the diagonals of a cube,prove that cos^(2)alpha+cos^(2)beta+cos^(2)gamma+cos^(2)delta=(4)/(3)

If the line makes angles alpha, beta, gamma, delta with four diagonals of a cube, then the value of cos^(2) alpha+cos^(2) beta+cos^(2) gamma+cos^(2) delta is equal to m/3 . Find m.

If cos (beta-gamma)+cos(gamma-alpha)+cos(alpha-beta)=-(3)/(2) then