Question

find cosine and equation of a line with the points:
a) (2,1,3)
b. (0,-3,0)
c.(1,0,1)

Answer 1

calc3!!! PLEASE HELP!!

Answer 2

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?