Simplify the Express $\sec \left( \tan ^ { - 1 } x \right)$

question 30

Multiple Choice

Simplify the express: $\sec \left( \tan ^ { - 1 } x \right)$ .

• A)1
• B) \(x ^ { 2 }\)
• C) \(\sqrt { x }\)
• D) \(\sqrt { x ^ { 2 } + 1 }\)
• E) \(\frac { 1 } { x }\)
• F) \(\frac { 1 } { \sqrt { x ^ { 2 } + 1 } }\)
• G) \(\frac { x } { \sqrt { x ^ { 2 } + 1 } }\)
• H)
• \(\frac { \sqrt { x ^ { 2 } + 1 } } { x }\)

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