Home
Class 12
MATHS
vec A isa vector with direction cosines ...

` 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`

Promotional Banner

Similar Questions

Explore conceptually related problems

If cosalpha+cosbeta+cosgamma=sinalpha+sinbeta+singamma=0 , then the value of cos3alpha+cos3beta+cos3gamma is

If sinalpha+sinbeta+singamma=cosalpha+cosbeta+cosgamma=0 then prove that cos3alpha+cos3beta+cos3gamma=3cos(alpha+beta+gamma)

If alpha+beta+gamma=2pi , prove that : cos^2 alpha + cos^2 beta + cos^2 gamma-2cosalpha cosbeta cosgamma=1 .

For all value of alpha,beta,gamma prove that ,cosalpha+cosbeta+cosgamma+cos(alpha+beta+gamma)=4cos(alpha+beta)/2*cos(beta+gamma)/2*cos(gamma+alpha)/2

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

If cosalpha+2cosbeta+3cosgamma=sinalpha+2sinbeta+3singamma=0 and alpha+beta+gamma=0 , then cos3alpha+8cos3beta+27sin3gamma=

If cosalpha,cosbeta,cosgamma are the direction cosines of a vector veca , then cos2alpha+cos2beta+cos2gamma is equal to

|{:(1,cos alpha, cos beta),(cos alpha, 1,cosgamma),(cosbeta,cosgamma,1):}|=|{:(0,cosalpha,cosbeta),(cosalpha,0,cosbeta),(cosbeta,cosgamma,0):}| if cos^(2)alpha+cos^(2)beta+cos^(2)gamma=

If cosalpha, cosbeta and cosgamma are the direction cosine of a line, then find the value of cos^2alpha+(cosbeta+singamma)(cosbeta-singamma) .