Teaching DSSSB TGT Mock Test 2025 Engineering Mathematics Complex Variables Singularities

For the function \(\frac{{\sin {\rm{z}}}}{{{{\rm{z}}^3}}}\) of a complex variable, the point \({\rm{z}} = 0\) is

1
a pole of order 4
2
a pole of order 3
3
a pole of order 2
4
not a singularity
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