QuestionFind $\cos \theta$ if $\tan \theta = -\frac{10}{7}$ and $\theta$ is in quadrant II.

Studdy Solution
Since $\theta$ is in quadrant II and cosine is negative in this quadrant, the final answer is$$\cos \theta = -\frac{7 \sqrt{149}}{149}$$So, the exact value of $\cos \theta$ is $-\frac{7 \sqrt{149}}{149}$.