Evaluate. Write your answer in simplified, rationalized form. Do not round.
sec 45°
2 answers
$\sec 45^\circ = \frac{1}{\cos 45^\circ} = \frac{1}{\frac{\sqrt{2}}{2}} = \frac{2}{\sqrt{2}} = \boxed{\sqrt{2}}$.
We have $\sec{45^\circ} = \frac{1}{\cos 45^\circ} = \boxed{\sqrt{2}}$.