2 vectors. 1st one is 6 meters. The other one has is 4 meters. By adding them together I want a module of 3 meters. What should the angle between those modules be? The answer is 153 degrees but I have no idea how to get to that answer. Thank you!

1 Answer
Feb 12, 2018

"please look at the fallowing details."

Explanation:

enter image source here

"You can solve it using Cosine's theorem."

3^2=6^2+4^2+2*6*4*cos theta

9=36+16+48*cos theta

9=52+48*cos theta

9-52=48*cos theta

-43=48*cos theta

cos theta=-43/48

theta=153.62" " deg

enter image source here