1. The problem is to evaluate $\sin\left(\frac{\pi}{2}\right)$.\n\n2. Recall that $\sin(\theta)$ gives the y-coordinate of the point on the unit circle at angle $\theta$.\n\n3. The angle $\frac{\pi}{2}$ radians corresponds to 90 degrees, which is the point at the top of the unit circle.\n\n4. At $\frac{\pi}{2}$, the coordinates are $(0,1)$, so $\sin\left(\frac{\pi}{2}\right) = 1$.\n\nFinal answer: $\sin\left(\frac{\pi}{2}\right) = 1$.