Question

The value of cos 180° is

Answer 1

$\implies$

• Within the unit circle, cosine provides the x coordinate of a point on the surface of the circle. Sine provides the y coordinate of a point on the surface of the circle.

At , 180, the point on the unit circle surface is (−1,0)

. So this means:

x=cos(180°)=−1

y=sin(180°)=0

To find the exact value of

cos(180°)−sin(180°)−1−0

0= −1

Answer 2

Step-by-step explanation:

-1

The value of cos 180 is equal to -1