1. Finding Direction Angles of Vectors

2. Direction Angles
Any vector that begins at the origin can easily be translated into a directional angle
This is usually done with a tangent ratio
Keep an eye out for 30,45,60 degree angles using the triangles!

3. Finding the directional angle of a vector
Example 1 – Uses the special triangles
U = 3i + 3j
Convert to i/j coordinates
Plot vector
Set up tangent ratio
Find reference angle
Use Quadrant to specify directional angle

4. Finding the directional angle of a vector
Example 2 – Does not use the special triangles
V = 3i – 4j