The angle of the vector is 38.65 degree.
The angle between two vectors is the angle between their tails.
The tangent is define as
[tex]tan \alpha = \frac{y}{x} \\tan \alpha = \frac{4}{5} \\\alpha = tan^{-1} (\frac{4}{5} )\\\alpha = 38.65 degree[/tex]
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