## liliy Group Title find cosine and equation of a line with the points: a) (2,1,3) b. (0,-3,0) c.(1,0,1) 2 years ago 2 years ago

What do you mean by "find cosine"? And, the equation of a line can be easily found by scaling a unit vector by all possible real values $$t \in \mathbb R$$. If $$\vec v$$ is a vector parallel to the line and $$\vec x$$ is a point on the line, then the set$\{\vec v t + \vec x: t \in \mathbb R\}$ is the graph of the line. What is an example of $$\vec v$$ and $$\vec x$$ in this case?