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cot x is not defined for_______(a) 0(b) nπ/2(c) (2n+1) π/2(d) nπI had been asked this question at a job interview.My question is taken from Trigonometric Functions topic in section Trigonometric Functions of Mathematics – Class 11

Answer»

The CORRECT ANSWER is (d) nπ

The explanation is: We know, cot x is not defined when sin x = 0.

sin x = 0 whenever x is 0, π, 2π, 3π, …. i.e. all integral MULTIPLES of π

so, x=nπ.



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