Question: A triangle ABC has base AB 2 units long and the angle BAC is 4 radians. Show that the vertex A lies on a circle

A triangle ABC has base AB 2 units long and the angle BAC is 4 radians. Show that the vertex A lies on a circle and find the equation of the circle. Take B to be the point B = (1, 0) and C to be the point C = (1, 0) in the plane. Also sketch the configuration. Note that there are two such circles.

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