Try the following ACT math practice question that tests your understanding of evaluating trigonometric expressions in the context of right triangles.

In the right triangle $ABC$ shown below, what is the value of $1 – \cos^2{A} – \cos^2{B}$ ?

- $\quad -1$
- $\quad \displaystyle -\frac{1}{2}$
- $\quad \displaystyle \hskip 0.8em 0$
- $\quad \displaystyle \hskip 0.8em 1$
- $\quad \displaystyle \hskip 0.6em \frac{1}{2}$

**Video explanation**