Vector Sum: Geometric Method

A has a length 3.76 cm and is at an angle of 34.5 degrees above the positive x-direction. B has a length 4.53 cm and is at an angle of 34.1 degrees above the negative x-direction. What is their sum?

Method 1

Method 2

Method 3

To solve for the magnitude and direction of the sum, apply the Cosine Law and the Sine Law to the triangle formed by A, B, and A+B.