Add to .

The resulting angle of is positive and coterminal with .

Since is in the first quadrant, the reference angle is .

Find the Reference Angle -(5pi)/3

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# Find the Reference Angle -(5pi)/3

Add to .

The resulting angle of is positive and coterminal with .

Since is in the first quadrant, the reference angle is .

Find the Reference Angle -(5pi)/3