Question

The function \( f(x) = \sec \left[ \log \left( x + \sqrt{1 + x^2} \right) \right] \) is ________ function

• A. even
• B. odd
• C. neither even nor odd
• D. square

Hint:

$\log(x+\sqrt{1+x^2})$ is a classic Odd function. Applying an Even function (like $\sec$) to an Odd function results in an Even function.

Answer 1

The Correct Option is A