Question

Points A, B, and C are plotted on the unit circle.

Which of the coordinates is equal to cos (pi)

A. x-coordinate of point A

B. y-coordinate of point A

C. x-coordinate of point B

D. y-coordinate of point B

E. x-coordinate of point C

F. y-coordinate of point C

Answer 1

Answer:

E. x-coordinate of point C

Step-by-step explanation:

Consider the diagram of the unit circle which has been drawn and attached.

Using a calculator in radians, $cos (\pi)=-1$

On the unit circle, out of points A, B and C, the point -1 is at point C.

Point C is located at (-1,0).

Therefore, $cos (\pi)$ is the x-coordinate of point C.

The correct option is E.

Answer 2

Answer:

c. x-coordinate of point B

Step-by-step explanation:

khan