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Which of the following statements is correct about the domain of the function \(f(x)=\tan x\)?

Answer and explanation

Correct answer: It is defined for all real \(x\) except \(x=\frac{(2n+1)\pi}{2}\), where \(n\in\mathbb{Z}\).

Since \(\tan x=\frac{\sin x}{\cos x}\), it is undefined wherever \(\cos x=0\). This occurs at \(x=\frac{(2n+1)\pi}{2}\). Option C excludes zeros of sine, which affect cotangent instead. Exam tip: check the denominator first.

Related tags

Trigonometric FunctionsTan XDomainFunction PropertiesClass 11 MathematicsTrigonometric Functions And Their PropertiesMathematicsClass 12 Mcq

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