Recent content by Casodd

So all I have to do is take the square root of ( |A|^2+ |B|^2cos79 ) ? and then do tan delta to find the degree? (Which is not the question) ? picture: Thanks for answering.

Homework Statement https://i.imgur.com/UtLzb34.png Homework Equations the law of cosinus The Attempt at a Solution I have not been available to scan my work, but I'm kinda stuck at the beginning. And our teacher have not show us this kind of physics yet. Thanks.