Find the magnitude of the angle between two vectors u = (3; -5) and v = (10; 6)

Correct answer:

α =  90 °

Step-by-step explanation:

u=(3,5)=(3,5) v=(10,6)=(10,6)  s=ux vx+uy vy=3 10+(5) 6=0  s = uv cos α  cosα=0  α=90=90

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