The function represents a circle centered at the origin with a radius of 1 unit. There is a point A with an angle to the negative x-axis of $50^\circ$. What is the value of the x-coordinate of point A?
Choices:
A:$\sin \left(50^{\circ}\right)$
B:$\cos \left(50^{\circ}\right)$
C:$\sin \left(140^{\circ}\right)$
D:$\cos \left(140^{\circ}\right)$
E:$\sin \left(230^{\circ}\right)$
F:$\cos \left(230^{\circ}\right)$
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: The function represents a circle centered at the origin with a radius of 1 unit. There is a point A with an angle to the negative x-axis of $50^\circ$. What is the value of the x-coordinate of point A?
Choices:
A:$\sin \left(50^{\circ}\right)$
B:$\cos \left(50^{\circ}\right)$
C:$\sin \left(140^{\circ}\right)$
D:$\cos \left(140^{\circ}\right)$
E:$\sin \left(230^{\circ}\right)$
F:$\cos \left(230^{\circ}\right)$
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: The function represents a circle centered at the origin with a radius of 1 unit. There is a point A with an angle to the negative x-axis of $50^\circ$. What is the value of the x-coordinate of point A?
Choices:
A:$\sin \left(50^{\circ}\right)$
B:$\cos \left(50^{\circ}\right)$
C:$\sin \left(140^{\circ}\right)$
D:$\cos \left(140^{\circ}\right)$
E:$\sin \left(230^{\circ}\right)$
F:$\cos \left(230^{\circ}\right)$