Posted by jake on Thursday, May 17, 2012 at 7:13pm.
find the angle between vector U=<2,3> and V=<1,5> answers: 88 degrees, 45 degrees, 135 degrees, or 92 degrees...?

trig  Reiny, Thursday, May 17, 2012 at 8:07pm
U∘V = U Vcos Ø, where Ø is the angle between
2  15 = √13√26cosØ
cosØ = 13/13√2
= 1/√2
Ø = 135° 
trig  Maura, Thursday, April 11, 2013 at 3:06pm
A point on the terminal side of an angle theta is given. Find the exact value of the six trigonometric functions of theta:
(2,3)