[" A line makes angles "_(alpha,beta,y)" with the "],[" co-ordinate axes.If "],[y=_(alpha+beta')^(<)=90^(@)," then "]

A line makes angles alpha,beta,gamma with the coordinate axes. If alpha + beta = pi//2 , then (cos alpha+cosbeta+cosgamma)^(2) is equal to

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

A line makes angles alpha,beta,gamma with the coordinates axes . If alpha+beta=90^@ then gamma is equal to

A line makes angles alpha,beta and gamma with the coordinate axes. If alpha+beta=90^0, then find gamma .

A line makes angles alpha,beta and gamma with the coordinate axes. If alpha+beta=90^0, then find gamma .

A line makes angles alpha,beta,gamma with co-ordinates axes. If alpha+beta=90^(@) then gamma is equal to

A line makes angles alpha,beta,gamma with co-ordinates axes. If alpha+beta=90^(@) then gamma is equal to

If a line makes angles alpha ,beta , gamma with the co-ordinates axes, then cos 2alpha +cos 2beta +cos 2gamma is :

If a line makes angles alpha, beta, gamma with the coordinate axes, prove that cos2alpha + cos 2beta + cos2gamma + 1 = 0 .