CHAPTER 5 — Vector Direction

This chapter discusses a second important vector property: direction. The previous chapter discussed the length of a vector. These are the two properties that define a vector.

Orientation of 2D vectors (represented in a particular coordinate frame).
Ambiguity when using arc tan to calculate angle.
Converting length and orientation into components of a column matrix.
Radians and degrees.
C and Java programing with arc tangent.

QUESTION 1:

What do you suppose is the direction of the vector represented by:

(4, 0)^T