Evaluate the Integral $$\int x \csc ^ { 2 } 3 x d x$$

Multiple Choice

Evaluate the integral.
- $$\int x \csc ^ { 2 } 3 x d x$$

A) $- 3 x \cot 3 x + 9 \ln | \sin 3 x | + C$
B) $- \frac { 1 } { 3 } x \cot 3 x + \frac { 1 } { 9 } \ln | \sin 3 x | + C$
C) $= x \cot 3 x + \ln | \sin 3 x | + C$
D) $\frac { 1 } { 3 } x \cot 3 x - \frac { 1 } { 9 } \ln | \sin 3 x | + C$