Unfortunately, it's not in degrees

Geometry Level 5

n=1sin(360n)n=ABπC\sum _{ n=1 }^{ \infty }{ \frac { \sin { \left( 360n \right) } }{ n } } =\frac { A }{ B } \pi -C

If the equation above holds true for positive integers A,BA,B and CC with A,BA,B coprime, submit your answer as CBAC-B-A.

Clarification: All the angles are measured in radians.

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