Editor
Editor
 Sep 18, 2022
0
$\sec hx$=
Difficulty: Easy
A: 
$\frac{2}{e^{x}+e^{-x}}$
B: 
$\frac{e^{x}-e^{-x}}{e^{x}+e^{-x}}$
C: 
$\frac{e^{x}+e^{-x}}{e^{x}-e^{-x}}$
D: 
$\frac{2}{e^{x}-e^{-x}}$
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NETNUST Entry TestMathematicsFunctions and Limits