Question

PLEASE HELP WITH THIS VECTORS PROBLEM!



If vectors a + 3b and 4a - b are perpendicular, and |a| = 2|b| are perpendicular, and |a| = 2|b|, determine the angle (to the nearest degree) between the non zero vectors a and b.

Please show all work, thanks :)

Answer 1

Are you using |a| to mean the magnitude of a?

Answer 2

Thanks cliffsedge
but I already found the solution :)

Answer 3

I ask because the phrase, "|a| = 2|b| are perpendicular" doesn't make any sense if you are talking about magnitudes. I'll assume that's a typo.

Answer 4

ah, ok, nm then. :-)