Answer
$-2.1291$
Work Step by Step
Step 1: sec$(-8.3429)$ is equal to the reciprocal of $cos (-8.3429)$.
Step 2: Convert the calculator to radian mode.
Step 3: Type $\frac{1}{cos (-8.3429)}$ into the calculator and press enter.
Step 4: $\frac{1}{cos (-8.3429)}\approx-2.1291$