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If \(f:\left(-\frac{\pi}{2},\frac{\pi}{2}\right)\to\mathbb{R}\), \(f(x)=\tan x\), which option is correct?

Answer and explanation

Correct answer: Onto and one-one

Step 1: On this interval, (\tan x) is strictly increasing. Step 2: As (x) approaches \(-\frac{\pi}{2}\), the value becomes very small, and near \(\frac{\pi}{2}\), it becomes very large. Hence the range is \(\mathbb{R}\). Step 3: Choosing a suitable interval can make a trigonometric function onto and one-one.

Related tags

Relations-FunctionsTangent-FunctionOnto-FunctionOnto FunctionRelations And FunctionsMathematicsClass 12 Mcq

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