If a line makes angles `alpha,betaa n dgamma` with threew-dimensional coordinate axes, respectively, then find the value of `cos2alpha+cos2beta+cos2gammadot`

If a line makes angle alpha, beta and gamma with the coordinate axes respectively, then cos2alpha+cos 2 beta+cos 2gamma=

If sin alpha+sin beta=2 then find the value of cos^(2)alpha+cos^(2)beta

If a line makes angle "alpha","beta\ and\ gamma" with the coordinate axes, find the value of "cos"2"alpha"+"cos"2"beta"+"cos"2"gamma"dot

If a line makes angles alpha, beta, gamma, delta with the diafonals of a cubes then the value of 9(cos 2alpha + cos 2beta + cos2gamma + cos 2delta)^(2) equals ….......

A line makes angles alpha,beta and gamma with the coordinate axes.If alpha+beta=90^(@), then find gamma

If sin alpha + sin beta =2 , then find the value of cos^(2)alpha+cos^(2)beta .

If a line makes angles alpha,beta and gamma with the coordinate axes,then prove that cos2 alpha+cos2 beta+cos2 gamma=-1

If a line makes angles alpha,beta,gamma with co-ordinate axes, then cos2alpha+cos 2 beta+cos2gamma=

If alpha, beta and gamma are angles made by the line with positive direction direction of X-axis, Y-axis and Z-axis respectively, then find the value of cos2alpha+cos2beta+cos2gamma .

If alpha,beta,a n dgamma are the an gles which a directed line makes with the positive directions of the co-ordinates axes, then find the value of sin^2alpha+sin^2beta+sin^2gammadot