First slide

Introduction to real valued functions

Question

The range of $f (x) = [cosec x]$

Easy

A

$R$
B

$Z$
C

$Z^{+}$
D

$Z - {0}$

Solution

Since $cosec x \leq - 1$ or $cosec x \geq 1$
$Range of [\cos ec x] is = Z - {0}$

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