Question

Find the angle between the vectors u and v.
u=cos(π/6)i+sin(π/6)j
v=cos(3π/4)i+sin(3π/4)j

A. 15°
B. 75°
C. 95°
D. 105°
E. 135°

Answer 1

D

Answer 2

Ok I know it's alot to write out but could explain how you found it because I found
u.v but after that I got lost...
I know the equation is:
\[u.v/\left| u \right|\left| v \right|\]

Answer 3

FIND THE DOT PRODUCT WHICH WILL GIVE U "COSINE FORMULA. COSA COSB + SINA SINB= COS(A-B)

Answer 4

ok thanks