Answer
$-0.9$
Work Step by Step
Using figure $13$, $\cos 2.7$ is approximately $-0.9$ (the x-value corresponding to $2.7$ on the circle).
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.