### Instruction: Find the curve defined by the equation
\[\theta = \frac{\pi}{3}.\](A) Line
(B) Circle
(C) Parabola
(D) Ellipse
(E) Hyperbola

Enter the letter of the correct option.### Response: What is $\theta$?
I think it's the angle in polar coordinates.
Right. So this equation is saying that the angle is constant.
So it should be a straight line.