Cosec and sometimes as csc is one of the trigonometric functions, in trigonometry. When the length of the hypotenuse is divided by the length of the opposite side, it gives the Cosecant of an angle in a right triangle.
Cosec X = Hypotenuse / OppositeSide
Cosecant is the reciprocal of Sin, Cosec x = 1 / SinX
As Cosec X = 1/ Sin X
Cosec 0 = 1 / sin 0
Cosec 0 = ∞