1. If the Cartesian equations of a line are Write the vector equation for the line.
2. If a line has direction ratios 2, –1, –2, then what are its direction cosines?
3.
4.
5.
1.
2. Write the direction ratios of the following line:
3. Find the distance between the planes 2x – y + 2z = 5 and 5x – 2.5y + 5z = 20.
4. Write the sum of intercepts cut off by the plane on the three axes.
6. If and then find the projection of and .
Write the vector equation for the line.
the three axes.
and 
then find the projection of 
and 
.
