# Points On A Circle

Consider the unit circle $$x^2 + y^ 2 = 1$$.
Choose 3 points uniformly at random on the circumference, which divides the circle into 3 arcs.

What is the expected length of the arc that contains the point $$(1,0)$$?

Technical details: We pick a point on the circumference uniformly at random in the following manner.
1. First select $$\theta \sim U[0,1]$$, the uniform distribution on the unit interval
2. Next, we pick the point $$p = \left( \cos ( 2 \pi \theta) , \sin ( 2 \pi \theta) \right)$$.

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