Q. 44.3( 30 Votes )

# If a line m

Answer :

Direction cosines of a line making angle α with x-axis, β with y-axis and γ with z-axis are l, m ,n.

l = cos α , m = cos β , n = cos γ

Here, α = 90° , β = 135° and γ = 45°

l = cos 90°

=0

m = cos 135°

= cos(180° - 45°)

= -cos 45° n = cos 45° OR

If the coordinates of a point A= (x1, y1, z1), then the position vector is Hence, the position vector of point P = (3,4,5) is If the position vector ( ) of a point on the line and a vector ( ) parallel to the line is given, then the vector equation of a line is given by Here, and , then  Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation view all courses RELATED QUESTIONS :

Find the equationMathematics - Board Papers

Find the vector aMathematics - Board Papers

Write the vector Mathematics - Board Papers

Find the value ofMathematics - Board Papers

<span lang="EN-USMathematics - Board Papers