The problem presents a sequence: $\sin 1, 2 \sin \frac{1}{2}, 3 \sin \frac{1}{3}, 4 \sin \frac{1}{4}, ...$ We need to find the general term of this sequence.

1. Problem Description

The problem presents a sequence: $\sin 1, 2 \sin \frac{1}{2}, 3 \sin \frac{1}{3}, 4 \sin \frac{1}{4}, ...$

We need to find the general term of this sequence.

2. Solution Steps

Let $a_n$ be the $n$-th term of the sequence.

Observing the given sequence, we can deduce the general term as:

$a_n = n \sin \frac{1}{n}$

3. Final Answer

The general term of the sequence is $a_n = n \sin \frac{1}{n}$.