\text{(B)}
Question:
Find the curve defined by the equation
\[r = \cos \theta + \sin \theta.\](A) Line
(B) Circle
(C) Parabola
(D) Ellipse
(E) Hyperbola

Enter the letter of the correct option.
Answer:
Let's think step by step.

user
\text{(B)}
Find the curve defined by the equation
\[r = \cos \theta + \sin \theta.\](A) Line
(B) Circle
(C) Parabola
(D) Ellipse
(E) Hyperbola

Enter the letter of the correct option.
train