\frac{\sqrt{65}}{9}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
In right triangle $BCD$ with $\angle D = 90^\circ$, we have $BC = 9$ and $BD = 4$.  Find $\sin B$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{\sqrt{65}}{9}
In right triangle $BCD$ with $\angle D = 90^\circ$, we have $BC = 9$ and $BD = 4$.  Find $\sin B$.
train