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tan x is not defined for_______(a) 0(b) nπ/2(c) (2n+1) π/2(d) nπI have been asked this question in an international level competition.Question is taken from Trigonometric Functions topic in division Trigonometric Functions of Mathematics – Class 11

Answer»

Right choice is (C) (2n+1) π/2

Easy explanation: We KNOW, tan X is not defined when cos x = 0.

cos x = 0 whenever x is π/2, 3π/2, 5π/2, ………… i.e. all odd INTEGRAL multiples of π/2

so, x=(2n+1) π/2.



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