Answer:
[tex]\large\boxed{\sin E=\dfrac{e}{f}}[/tex]
Step-by-step explanation:
[tex]sine=\dfrac{opposite}{hypotenuse}[/tex]
[tex]\text{We have}\\\\opposite=e\\hypotenuse=f\\\\\text{subtitute:}\ \sin E=\dfrac{e}{f}[/tex]