Domain of sec⁻¹x − tan⁻¹x

Find the Domain of sec-1x − tan-1x

Solution:

Given function:

\[ f(x) = \sec^{-1}(x) – \tan^{-1}(x) \]

Step 1: Domain of sec⁻¹(x)

\[ x \leq -1 \quad \text{or} \quad x \geq 1 \]

Step 2: Domain of tan⁻¹(x)

\[ x \in \mathbb{R} \]

Step 3: Intersection

\[ (-\infty, -1] \cup [1, \infty) \]

Final Answer:

Domain = \[ (-\infty, -1] \cup [1, \infty) \]

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