Question

vector question, please help: http://prntscr.com/8bm3k4

Answer 1

Do you know the formula to find it?

Answer 2

what formula is it?

Answer 3

i do not recall any formula

Answer 4

here u go ^u^
http://www.dummies.com/how-to/content/how-to-find-the-angle-and-magnitude-of-a-vector.html

Answer 5

have u learnt about dot product