A ray of light is incident on a plane mirror along a vector `hat i+hat j- hat k.`
The normal on incidence point is along `hat i+ hat j `.Find a unit vector along the
reflected ray.

The vector (hat i +hat j) is a unit vector.

The unit vector along hat(i)+hat(j) is

Find a unit vector parallel to the vector 3 hat i +7 hat j + 4 hat k .

The unit vector along vec(A)= 2 hat i + 3 hat j is :

Unit vector along 3hat(i)+3hat(j) is

Write the projection of vector hat i+hat j+hat k along the vector hat j.

A point object infront of a plane mirror has velocity -2 hat i+ 3 hat j + 4 hat k and the mirror has velocity 3 hat i- 2 hat j+ 4 hat k . The x-axis is along the normal of the pane mirrro. Find the velocity of the image.

Find the resultant of vectors vec a=hat i-hat j+2hat k and vec b=hat i+2hat j-4hat k. Find the unit vector in the direction of the resultant vector.

What vector must be added to the two vectors hat i+2hat j-hat k and hat i-hat j+2hat k so that the resultant may be unit vector along Y - axis?