No links:

Question No. 8 
Use the following information to answer the next question. 
$$\begin{gathered} \cos \left(2\mathrm{y}-15°\right)+\sin \left(2\mathrm{y}-15°\right)=\sqrt{\frac{3}{2}} \\ \mathrm{What} \mathrm{is} \mathrm{the} \mathrm{value} \mathrm{of} \mathrm{y} \left(0\le \mathrm{y}\le 90°\right)? \end{gathered}$$
(A) 0^o
(B) 5^o
(C) 15^o
(D) 30^o