1979 USAMO Problems/Problem 2
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Problem
is the north pole. 
and 
are points on a great circle through equidistant from . 
is a point on the equator. Show that the great circle through and bisects the angle 
in the spherical triangle 
(a spherical triangle has great circle arcs as sides).
| 1979 USAMO (Problems • Resources) | ||
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