x=19 * sin(40)
x = 12.21
1) Since we have a right triangle and the opposite leg to angle 40º, then we can write the following trig ratio
[tex]\begin{gathered} \sin (40)=\frac{x}{19} \\ x=19\cdot\sin (40) \\ x=12.21296 \\ x\approx12.21 \end{gathered}[/tex]2) Then the equation for that is x= 19*sin(40) and the value of that leg is approximately 12.21 units