Find a vector that lies in the plane determined by a line and a point and is perpendicular to that line

898 Views Asked by At

I need to use the triple cross product to find a vector that lies in the plane determined by

the point (1, 0, 2) and the line $\frac {x}{2}=\frac {y+1}{3}=\frac {z-2}{-1}$ , and is perpendicular to the line

1

There are 1 best solutions below

0
On

Hint:

Let $A(1,0,2)$. You can simply determine the coordinates of the intersection $H$ of the line and the plane through $A$ perpendicular to the line: you'll then can take the vector $\overrightarrow{AH}$.

As the line has $\;\vec u(2,3,-1)$ as a directing vector, an equation of the plane through $A$ perpendicular to the line is $$2x+3y-z=2\cdot 1+3\cdot 0-1\cdot 2=0.$$ Can you continue?