Answer
$\sec{(-8.3429)}\approx -2.1291$
Work Step by Step
RECALL:
$\sec{\theta} = \dfrac{1}{\cos{\theta}}$
Use a calculator in radian mode and round-off the answer to four decimal places to obtain:
$\sec{(-8.3429)}=\dfrac{1}{\cos{(-8.3429)}} \approx -2.1291$
