- #1

fishguts

- 9

- 0

## Homework Statement

I am having a problem with a mastering physics problem. I am given this image

I am to Express C in terms of vector A, vector B, and angle theta, using radian measure for known angles. I know theta is equal to pi - c.

## Homework Equations

law of cosines

## The Attempt at a Solution

By using the law of cosines the answer i got was

C = sqrt(A^2 + B^2 - 2ABcos(θ))

The feedback I got back from the program was to check my signs but everything apperas to be correct. Can someone help me out?