Question

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

• A. Odd
• B. Even
• C. Neither odd nor even
• D. Constant

Answer 1

Answer: (B)

Even

$f\left(x\right)=sec\left(In\right(x+\sqrt{1+x^2}\left)\right)=secx$ (odd function)
$=evenfunction$
$\because secx$ is an even function.