Question

Consider vectors u and v, where u = (1, -1) and v = (1, 1). What is the measure of the angle between the vectors?

Answer 1

Answer:

c

Step-by-step explanation:

edge

Answer 2

Answer:

I believe the answer is C. 90 degrees

Step-by-step explanation:

First you find the lengths of the two vectors, which are both $\sqrt{2}$. Then you find the angle given the cos using:   cos(∅)=$\frac{u*v}{|u|*|v|}$ = $\frac{0}{\sqrt{2}*\sqrt{2} }$ = 0. Then using ∅=acos(0)=$\frac{\pi }{2}$ = 90°