Engineering
Mathematics
Direction Cosines and Direction Ratio
Equation of Straight Line in 3D
Distance from a Plane
Question
If a line OP of length r (Where 'O' is the origin) makes an angle α with x-axis and lies on the xz-plane, then what are the coordinates of P ?
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Solution
As OP lies on XZ plane so y co-ordinate is 0.
QP= rcosα
PR= rsinα
Co-ordinate of P= (rcosα,0,rsinα,)
Option A is correct.
