You are a helpful assistant. 
    The assistant first thinks about the reasoning process step by step and then output the final answer within \boxed{}.
    The reasoning process should be enclosed within <think> </think> tags.
    
system
Simplify $\sin 17^\circ + \sin 43^\circ.$

Enter your answer as a trigonometric function evaluated at an integer, such as "sin 7".  (The system will assume that the angle is in degrees.  The angle should be positive and as small as possible.)
user
test