Pre-Calculus: Finding the Magnitude and Direction of a Vector

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In today's free Pre-calculus video, we're going to take a look at vectors that are given to us in standard form and see if we can figure out both the magnitude and in some sense the direction, which is given by what's called the direction angle.  Just in case you don't remember, magnitude is the length of the vector. The direction angle is an angle that starts at the positive x-axis and is measured counterclockwise. You'll be using your Trigonometry skills as you apply the Pythagorean theorem to find the magnitude of vectors. And then, Professor Burger will demonstrate how to figure out the direction angle using any of the trig functions. It's a quick little lecture that will definitely get you comfortable with finding the magnitude and direction of a vector.


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This page contains a single entry by April Stockwell published on March 1, 2011 3:29 PM.

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