The direction angles of the line `x=4z+3,y=2-3z" are "alpha,betaandgamma`, then `cosalpha+cosbeta+cosgamma`=_____.

The direction angles of the line x=4z+3, y=2-3z are alpha, beta and gamma , then cos alpha +cos beta+ cos gamma = ____

If sinalpha + sinbeta + singamma = 3 , then cosalpha + cosbeta + cosgamma equals :

vec A isa vector with direction cosines cosalpha,cosbetaa n dcosgammadot Assuming the y-z plane as a mirror, the directin cosines of the reflected image of vec A in the plane are a. cosalpha,cosbeta,cosgamma b. cosalpha,-cosbeta,cosgamma c. -cosalpha,cosbeta,cosgamma d. -cosalpha,-cosbeta,-cosgamma

vec A isa vector with direction cosines cosalpha,cosbetaa n dcosgammadot Assuming the y-z plane as a mirror, the directin cosines of the reflected image of vec A in the plane are a. cosalpha,cosbeta,cosgamma b. cosalpha,-cosbeta,cosgamma c. -cosalpha,cosbeta,cosgamma d. -cosalpha,-cosbeta,-cosgamma

vec A isa vector with direction cosines cosalpha,cosbetaa n dcosgammadot Assuming the y-z plane as a mirror, the directin cosines of the reflected image of vec A in the plane are a. cosalpha,cosbeta,cosgamma b. cosalpha,-cosbeta,cosgamma c. -cosalpha,cosbeta,cosgamma d. -cosalpha,-cosbeta,-cosgamma

vec A isa vector with direction cosines cosalpha,cosbetaa n dcosgammadot Assuming the y-z plane as a mirror, the directin cosines of the reflected image of vec A in the plane are a. cosalpha,cosbeta,cosgamma b. cosalpha,-cosbeta,cosgamma c. -cosalpha,cosbeta,cosgamma d. -cosalpha,-cosbeta,-cosgamma

vec A isa vector with direction cosines cosalpha,cosbetaa n dcosgammadot Assuming the y-z plane as a mirror, the directin cosines of the reflected image of vec A in the plane are a. cosalpha,cosbeta,cosgamma b. cosalpha,-cosbeta,cosgamma c. -cosalpha,cosbeta,cosgamma d. -cosalpha,-cosbeta,-cosgamma

The angle between the lines -6x=y=4z and 2x=3y=-z is -

The angle between the lines 2x=3y=-z and 6x=-y=-4z is

The angle between the lines 2x=3y=-z and 6x=-y=-4z is