CommandscscOn this pagecsc csc (angle) The csc function returns the cosecant of angle which is in radians. csc(x)=1sin(x).\displaystyle \csc (x)=\frac{1}{\sin (x)} .csc(x)=sin(x)1. In complex expressions, angle is complex, and csc(angle) returns a complex value. See Also sin, cos, tan, sec, cot