Question

Which important note applies to \[y=\sec^{-1}x\]?

Options

• Increasing function

• Decreasing function

• Symmetric about the origin (odd function)

• Strictly decreasing over its entire domain

Answer 1

The important note for \[y=\sec^{-1}x\] is Increasing function. Its principal-value range excludes \[\frac{\pi}{2}\].