what is the reference angle of -13pi/3?
What is the reference angle for (-\frac{13\pi}{3})? Could you please explain the process involved in finding it?
4 Answers
-13 pi / 3 is - 4 1/3 pi, two full times around plus pi/3 but in a clockwise direction so the reference angle would be pi/3
✰Answer✰
60 degrees
✐Derivation✐
Know that:
Reference angle - angle formed by the coterminal ray and x-axis.
So
-13π/3 = -13(180)/3 = -780
1080 - 780 = 300
360 - 300 = 60
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