The trigonometric function we need to evaluate is:

This function is given by:

In the unit circle, graphically these measures are given by:
Then, the cosecant will be undefined when the opposite side (y-value) is equal to zero, so let's check the given angles:
![\begin{gathered} \csc0=(1)/(0)=undefined \\ \\ \csc90=(1)/(1)=1 \\ \\ \csc270=(1)/(-1)=-1 \end{gathered}]()
And we can't find the exact value of csc 315, but with a little help from the unit circle, we can observe that the opposite side measures a value different than 0:
So, the answer is 0°.