find the magnitude and dirction of the resultant force of two perpendicular forces F1=3N and F2=4N
use Pythagoras to find the magnitude ... r^2 = 3^2 + 4^2
starting at F2 , and measuring towards F1; the tangent of the resultant angle is ... 3 / 4
starting at F2 , and measuring towards F1; the tangent of the resultant angle is ... 3 / 4