Answer:
To find the length y from the given right anled triangle.
Since the given triangle is right anled triangle,
we have the following,
[tex]\sin \theta=\frac{opposite\text{ side}}{hypotenuse}[/tex]
Let,
hypotenuse =14
opposite side=y
Substitute the values we get,
[tex]\sin 30\degree=\frac{y}{14}[/tex]
we know that, sin 30=1/2
Using this we get,
[tex]\frac{1}{2}=\frac{y}{14}[/tex][tex]y=\frac{14}{2}[/tex][tex]y=7[/tex]
Answer is: option D: 7
