There is a function representing a circle centered at the origin with a radius of 1 unit. Point A is on the circle. What is the value of the y-coordinate of point A?
Choices:
A:$\sin \left(0^{\circ}\right)$
B:$\cos \left(0^{\circ}\right)$
C:$\sin \left(90^{\circ}\right)$
D:$\cos \left(90^{\circ}\right)$
E:$\hline \sin \left(270^{\circ}\right)$
F:$\cos \left(270^{\circ}\right)$
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: There is a function representing a circle centered at the origin with a radius of 1 unit. Point A is on the circle. What is the value of the y-coordinate of point A?
Choices:
A:$\sin \left(0^{\circ}\right)$
B:$\cos \left(0^{\circ}\right)$
C:$\sin \left(90^{\circ}\right)$
D:$\cos \left(90^{\circ}\right)$
E:$\hline \sin \left(270^{\circ}\right)$
F:$\cos \left(270^{\circ}\right)$
Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
Question: There is a function representing a circle centered at the origin with a radius of 1 unit. Point A is on the circle. What is the value of the y-coordinate of point A?
Choices:
A:$\sin \left(0^{\circ}\right)$
B:$\cos \left(0^{\circ}\right)$
C:$\sin \left(90^{\circ}\right)$
D:$\cos \left(90^{\circ}\right)$
E:$\hline \sin \left(270^{\circ}\right)$
F:$\cos \left(270^{\circ}\right)$