Two vectors having equal magnitudes A make an angle `theta` with eahc other. Find the magnitude and direction of the resultant.

Explanation

To find the magnitude and direction of the resultant of two vectors having equal magnitudes \( A \) that make an angle \( \theta \) with each other, we can follow these steps:

### Step 1: Understand the Problem
We have two vectors \( \vec{A_1} \) and \( \vec{A_2} \) with equal magnitudes \( A \) and an angle \( \theta \) between them. We need to find the resultant vector \( \vec{R} \) in terms of its magnitude and direction.

**Hint:** Recall the law of cosines for vector addition.

### Step 2: Use the Law of Cosines
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