I need to evaluate if two lines are perpendicular and give a reason for my answer.
So: To show that the lines are not perpendicular, I need to show by the dot product method that my calculation does not = 0. Because cos(0)=90, perpendicular lines.
I have two lines below:
I need to start with my components in (i, j, k) form.
The angle between the lines is the angle between their directions. The directions are U and V.