The question is related to trigonometric ratio rule .
In the given diagram, there is a right angle triangle, with adjacent =57, and the unknown side is y. Given angle measurement is 39 .
To find the measurement of y, we will use tan rule which is
[tex] tan \Theta = \frac{opposite}{adjacent} [/tex]
[tex] tan 39=\frac{y}{57} [/tex]
y = 57 tan 39 = 46.2
