It Can Be Shown That the Area Enclosed Between the X-Axis

Multiple Choice

It can be shown that the area enclosed between the x-axis and one arch of the sine curve is 2. Use this fact to compute the
definite integral.
- $\int _ { 0 } ^ { 6 \pi } \sin \left( \frac { x } { 6 } \right) d x$ (Hint: each rectangle is 6 times as wide.)

A) 72
B) 2
C) 12
D) 6