fun-lim

Question: The range of $f(x)=\sec \left( \frac{\pi }{4}{{\cos }^{2}}x \right)\,,\ -\infty < x < \infty $ is



1) $[1,\ \sqrt{2}]$
2) $[1,\ \infty )$
3) $[-\sqrt{2},\ -1]\cup [1,\ \sqrt{2}]$
4) $(-\infty ,\ -1]\cup [1,\ \infty )$
Solution: Explanation: No Explanation
Functions

Rate this question:

Average rating: (0 votes)

Previous Question Next Question