# Angle

A straight line p given by the equation
$y=\frac{-8}{6}x+78$
. Calculate the size of angle in degrees between line p and y-axis.

Correct result:

x =  143.1301 °

#### Solution:

$x=9{0}^{\circ }-\mathrm{arctan}\left(-8\mathrm{/}6\right)=143.130{1}^{\circ }=14{3}^{\circ }{7}^{\mathrm{\prime }}48\mathrm{"}$

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