1. ## sec (-180)

ok so i know this would be h/a

would it be

a=-1
b=0
c=1

so would the answer be -1 ??? did i do it right

2. $\sec (-\pi) = \frac{1}{\cos (-\pi)*} = \frac{1}{\cos \pi *} = ...$

* $- \pi$ is the same position on the unit circle as $\pi$.