The refracting angle of a prism is A and refractive index of the material of prism is `cot(A//2)` . The angle of minimum deviation will be

Explanation

To find the angle of minimum deviation (Δ_min) for a prism with a refracting angle A and a refractive index (μ) of cot(A/2), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the relationship between refractive index and angles:**
The refractive index of a prism at minimum deviation is given by the formula:
\[
\mu = \frac{\sin\left(\frac{A + \Delta_{min}}{2}\right)}{\sin\left(\frac{A}{2}\right)}
...