A \( \frac{\sin^{2}{\left ( a + y \right )}}{\cos{y}} \)
B \( \frac{\sin^{2}{\left ( a + y \right )}}{\sin{a}} \)
C \( \frac{\sin{2} \left ( a + y \right )}{\cos{a}} \)
D \( \frac{\sin^{2}{\left ( a + y \right )}}{\cos{a}} \)
Correct Answer: Option B
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