# Lecture - 10 Chapter 11 Three Dimensional Geometry

“Whenever you find yourself on the side of the majority, it is time to pause and reflect.” –Mark Twain

2. Find the vector equation of a plane which is at a distance of 7 units from the origin and normal to the vector $$3\hat{i}+5\hat{j}-6\hat{k}$$.

12. Find the vector equation of the plane which is at a distance of $$\frac{6}{\sqrt{29}}$$ from the origin and its normal vector from the origin is $$2\hat{i}-3\hat{j}+4\hat{k}$$. Also find its cartesian form.

13. Find the direction cosines of the unit vector perpendicular to the plane $$\vec{r}.(6\hat{i}-3\hat{j}-2\hat{k})+1=0$$ passing through the origin.

14. Find the distance of the plane 2x-3y+4z-6=0 from the origin.