## Precalculus (6th Edition)

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