Ask Me Help Desk - Two vectors A and B are given by A= 5i + 6j + 7k and B= 3i

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Two vectors A and B are given by A= 5i + 6j + 7k and B= 3i - 8j +2k. If these two vec

Two vectors A and B are given by A= 5i + 6j + 7k and B= 3i - 8j +2k. If these two vectors are drawn starting at the same point, whatis the angle between the two vectors?

Calculate the dot product of the two vectors using two different techniques:

$<br /> \vec A \cdot \vec B = |A||B| \cos \theta \\ <br /> \vec A \cdot \vec B = a_i b_i + a_j b_j + a_k b_k<br />$

Set them equal, and solve for $\theta$

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