[color=#000000]A vector is a mathematical quantity with both magnitude and direction. [br][br]The[b] magnitude of vector u[/b], denoted |[b]u[/b]|, is it's length. [br][color=#a64d79]One way to express its direction is to give the angle it makes with a horizontal ray (that points to the right) that is parallel to the positive x-axis. This is called the vector's [b]direction angle. [/b][/color][b][br][/b][br]See below. You can also change the locations of the vector's initial point and terminal point[/color]. [br][br][color=#0000ff][b]KEY QUESTION:[/b] Given a vector's magnitude and direction, how can you rewrite this vector in component form? < , > ? [/color]