Question

. The value of expression cos(-ė)is
A. -sine•
B. sin•
C. cos°
D.-cos•​

Answer 1

Answer:

C

Step-by-step explanation:

Cosine Function (Negative Measure)

$\displaystyle \large{ \cos( - x) = \cos(x) }$

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°