1. The problem is to find the value of $\frac{\pi}{2}$.\n\n2. $\pi$ (pi) is a mathematical constant approximately equal to 3.14159.\n\n3. To find $\frac{\pi}{2}$, divide the value of $\pi$ by 2.\n\n4. Calculation: $$\frac{\pi}{2} = \frac{3.14159}{2} = 1.570795$$\n\n5. Therefore, the value of $\frac{\pi}{2}$ is approximately 1.5708.