- #1

Daweih

- 7

- 0

**Consider two displacements, one of magnitude 3.3 m and another of magnitude 4.3 m. What angle between the directions of this two displacements give a resultant displacement of magnitude (a) 5.1 m, (b) 2.8 m, and (c) 4.7 m.**

## Homework Equations

I've been using the law of cosine to work out this problem, but my answers have all come out to be wrong. Am I incorrect in using it to solve this problem or am I just doing my math wrong?

c^2 = a^2 + b^2 - 2abcosγ

**My answers are as follows: a) 83° b) 41° c)75°**

I would really appreciate the help. =(