#### Answer

$\sec 60^{\circ} = \frac{1}{\cos60^{\circ}} $`
$ \frac{1}{\cos60^{\circ}} = \frac{1}{\frac{1}{1}} = 2$

#### Work Step by Step

$\sec 60^{\circ} = \frac{1}{\cos60^{\circ}} $` (using inverse property)
$ \frac{1}{\cos60^{\circ}} = \frac{1}{\frac{1}{1}} = 2$ (using substitution property)