Find the line integral ${\displaystyle \underset{C}{\overset{\phantom{}}{}}}(5x+4y)ds$ along the curve $C,$ which is given by $x=sin(3t),y=2sin(3t),$ and $0t\frac{}{3}.$

$($Express numbers in exact form. Use symbolic notation and fractions where needed.$)$

${\displaystyle \underset{C}{\overset{\phantom{}}{}}}(5x+4y)ds$