Given the figure of a right-angle triangle.
The hypotenuse of the triangle = q units
One of the legs of the triangle = r units
The side (r) is the opposite side to the angle (y) and the adjacent side to the angle (x)
So,
[tex]\frac{r}{q}=cosx=siny[/tex]
Now, check the options to select the correct answer
So, the answer will be option 3) sin y°
