Question
tow people begin walking from the same point at the same time. One walks due south at 3 mph and the other walks southeast at 4 mph. Approximately how far apart are the two after one hour walking?
Answers
Steve
use the law of cosines.
x^2 = 3^2 + 4^2 - 2(3)(4) cos 45°
x^2 = 3^2 + 4^2 - 2(3)(4) cos 45°