How do you find the reference angle for $(-5pi$ /6#?

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Answer 1 · 2015-04-22T20:40:25

http://www.mathopenref.com/reference-angle.html
Definition: The smallest angle that the terminal side of a given angle makes with the x-axis.

Assuming a base side for the angle along the X-axis, the reference angle is the smallest acute angle as measured from the X-axis

$(- (5pi)/6)$ is $(-pi/6)$ short of being a straight line

So the reference angle for $(- (5pi)/6)$ is
$pi/6$

How do you find the reference angle for (-5pi(-5pi/6#?