Inverse Cosecant Function Definition and Range

Rarely Tested

$$y = \csc^{-1} x \quad \mathrm{iff} \quad x = \csc y$$

Principal range: $$y \in \left[-\frac{\pi}{2}, 0\right) \cup \left(0, \frac{\pi}{2}\right]$$, Domain: $$|x| \geq 1$$

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