Use the following information to answer questions 48–51.

The 2 circles graphed in the standard (x,y) coordinate plane below are centered at the origin, O. In coordinate units, the radius of the smaller circle is 2, and the radius of the larger circle is 4. Points A(-4,0), B, and C(4,0) are on the larger circle. The measure of ∠BOC is 45°.

(Note: Both axes have the same scale.)