If a Is the Area of the Region Bounded by One

Multiple Choice

If A is the area of the region bounded by one petal of the five-petal rose $r = \sin 5 \theta,$ then A is

A) $\frac { \pi } { 2 }$
B) $\frac { \pi } { 3 }$
C) $\frac { \pi } { 5 }$
D) $\frac { \pi } { 10 }$
E) $\frac { \pi } { 20 }$