Math Chapter Wise Vector, Gradient And Curl English MCQ NVS PGT 10-06-2019 Q.The nature of singularity of the function tan (1/z): Az=0 is a non –isolated essential singularity Bz = 0 is an isolated singularity Cz=0 is an isolated essential singularity Dz = 0 is a removable singularity Show answer Correct answer: z=0 is a non –isolated essential singularity