Answer:
C
Step-by-step explanation:
Cosine Function (Negative Measure)
[tex] \displaystyle \large{ \cos( - x) = \cos(x) }[/tex]
This is because cos(-x) starts in QIV to III to II and I.
In QIV, cos is positive hence cos(-x) = cosx.
So cos(-e°) is cose°
