## Atkinsoha Group Title PreCalc & Trig, picture below, please show your work.. one year ago one year ago

1. Atkinsoha Group Title

2. tyteen4a03 Group Title

Firstly, calculate the hypotenuse, then find cos(theta), then find theta. Once you have found theta, use it to calculate cos(theta/2). However, if you are required to use identities (which I doubt), remember that $$cos^2(\theta) = \frac{1+cos(\theta)}{2}$$.