The Polar Equation of a Circle Is Given $$\mathrm { r } = - 10 \sin \theta$$

Multiple Choice

The polar equation of a circle is given. Give polar coordinates for the center of the circle and identify its radius.
- $$\mathrm { r } = - 10 \sin \theta$$

A) $\left( - 10 , \frac { \pi } { 2 } \right)$ , radius $= 10$
B) $\left( - 5 , \frac { \pi } { 2 } \right)$ , radius $= 5$
C) $\left( 5 , \frac { \pi } { 2 } \right)$ , radius $= 5$
D) $\left( 10 , \frac { 3 \pi } { 2 } \right)$ , radius $= 10$