CBSE Class 12-science Answered
Sir, what will be the direction cosines of the line (x-2)/2=(2y-5)/-3 and z=4
Asked by DIVYA GARG | 14 Dec, 2013, 01:23: PM
Expert Answer
The direction cosines of the line 
are l, m and n.
are l, m and n.Since we have z=4, the given line lies in the plane xy and it is perpendicular to the z axis.
Thus it makes an angle 90 degree with z axis.
Therefore the direction lines of the given line
and z=4 are 2 , -3 and cos(90).That is, the required direction cosines are 2, -3 and 0.
Answered by Vimala Ramamurthy | 14 Dec, 2013, 06:15: PM
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