<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 If for any $a \gt 0$ and $a\neq 1$, the graph of the function $f\left(x\right)=a^{x+1}+1$ passes through a fixed point $P$, and point $P$ lies on the terminal side of angle $\theta$, then $\tan \theta =$____. Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
-2
If for any $a \gt 0$ and $a\neq 1$, the graph of the function $f\left(x\right)=a^{x+1}+1$ passes through a fixed point $P$, and point $P$ lies on the terminal side of angle $\theta$, then $\tan \theta =$____.
test