Tính \[\smallint sin\left( {\frac{\pi }{3} - \frac{x}{4}} \right)dx\]

\[\frac{1}{2}cos\left( {\frac{\pi }{3} - \frac{x}{2}} \right) + C\]

\[4cos\left( {\frac{\pi }{3} - \frac{x}{4}} \right) + C\]

\[2\sin \left( {\frac{\pi }{3} - \frac{x}{2}} \right) + C\]

\[\frac{1}{2}\sin \left( {\frac{\pi }{3} - \frac{x}{2}} \right) + C\]