Find an Equivalent Equation in Polar Coordinates $$y = x$$ A) $\sin \theta = - \cos \theta$

Multiple Choice

Find an equivalent equation in polar coordinates.
- $$y = x$$

A) $\sin \theta = - \cos \theta$
B) $r = \sin \theta$
C) $\mathrm { r } = \cos \theta$
D) $\sin \theta = \cos \theta$