Given a Right Triangle, you need to remember the following Trigonometric Function:
[tex]\sin \theta=\frac{opposite}{hypotenuse}[/tex]
In this case, you know that:
[tex]\begin{gathered} O=8 \\ H=16 \end{gathered}[/tex]
Where "O" is the opposite side and "H" is the hypotenuse of the Right Triangle.
Then, substituting values and simplifying the fraction, you get:
[tex]\begin{gathered} \sin \theta=\frac{8}{16} \\ \\ \sin \theta=\frac{1}{2} \end{gathered}[/tex]
In order to get the value in decimal form, you need to divide the numerator by the denominator:
[tex]\sin \theta=0.500[/tex]
Hence, the answer is: Choice 'D'.
