Answer
$\cos (- 315)^{\circ}$ = 0.7071
Work Step by Step
Using calculator in degree mode-
(- 315) → $\cos$
$\cos (- 315)^{\circ}$ = 0.7071067812
Rounding it to four places past the decimal point-
$\cos (- 315)^{\circ}$ = 0.7071
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.