Find the angle between the given vectors to the nearest tenth of a degree. u = 6, -1, v = 7, -4

20.3°
10.2°
0.2°
30.3°

Step-by-step explanation:

u=6i-j

v=7i-4j

u.v=|6i-j||7i-4j| cos α,where α is the angle between u & v.

(6i-j).(7i-4j)=√(6²+(-1)²)√(7²+(-4)²) cos α

(6)(7)+(-1)(-4)=√37√65 cos α

42+4=√37√65  cos α

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step-by-step explanation: