Find the Equation of the Tangent Line to the Curve $x = 3 \pi / 4$

Multiple Choice

Find the equation of the tangent line to the curve given by f(x) = x sin x at the point $x = 3 \pi / 4$ .

A) $y + \frac { \pi \sqrt { 2 } } { 8 } = \frac { \sqrt { 2 } } { 2 } \left( \frac { 3 \pi } { 4 } - 1 \right) \left( x - \frac { 3 \pi } { 4 } \right)$
B) $y - \frac { \pi \sqrt { 2 } } { 8 } = \frac { \sqrt { 2 } } { 2 } \left( \frac { 3 \pi } { 4 } + 1 \right) \left( x - \frac { 3 \pi } { 4 } \right)$
C) $y - \frac { \pi \sqrt { 2 } } { 8 } = - \frac { \sqrt { 2 } } { 2 } \left( \frac { 3 \pi } { 4 } + 1 \right) \left( x - \frac { 3 \pi } { 4 } \right)$
D) $y - \frac { \pi \sqrt { 2 } } { 8 } = - \frac { \sqrt { 2 } } { 2 } \left( \frac { 3 \pi } { 4 } - 1 \right) \left( x - \frac { 3 \pi } { 4 } \right)$