We need to find the angle theta for which csc (theta) is undefined.
csc is the reciprocal of sine trigonometric function.
Therefore, csc (theta) = 1/ sin (theta).
We know sin(0)° = 0.
Let us check the value of csc (theta) by taking theta =0.
csc(0)° = 1/ sin (0)°.
Plugging value of sin(0)° = 0.
csc(0)° = 1/0.
1/0 is undefined value.
