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For which of the following values is \(\tan x\) undefined?

Answer and explanation

Correct answer: \(x=\frac{(2n+1)\pi}{2},\; n\in\mathbb{Z}\)

\(\tan x=\frac{\sin x}{\cos x}\). It is undefined when \(\cos x=0\), i.e. at \(x=\frac{(2n+1)\pi}{2}\). At \(x=n\pi\), tan equals 0, so option A is not correct. Exam tip: link tan’s domain to non-zero cosine.

Related tags

Trigonometric FunctionsTangent FunctionDomain Of TangentUndefined ValuesClass 11 MathematicsTrigonometric Functions And Their PropertiesMathematicsClass 12 Mcq

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