Solution :
The value of Cosec 0 degrees is equal to ∞ or not defined.
Proof :
∠ A is made smaller and smaller in the right Δ ABC till it becomes zero. As ∠ A gets smaller and smaller the length of the side BC decreases. The point C gets closer to the point B and finally when ∠ A becomes very close to 0 degrees, AC becomes almost the same as AB, and BC gets very close to 0.
By using trigonometric formula,
Cosec A = hypontenuseperpendicular = hp
Cosec A = ACBC = AC0 = 10 = not defined
Hence, cosec0∘ = ∞ or not defined.