If the angle between two vectors in increase from `0^(@)` to `180^(@)` , what is the effect on the magnitude of the resultant of two vectors ?

Explanation

To determine the effect on the magnitude of the resultant of two vectors as the angle between them increases from \(0^\circ\) to \(180^\circ\), we can follow these steps:

### Step 1: Understanding the Resultant of Two Vectors
The magnitude of the resultant vector \(R\) of two vectors \(\vec{A}\) and \(\vec{B}\) with an angle \(\theta\) between them is given by the formula:
\[ R = \sqrt{A^2 + B^2 + 2AB \cos \theta} \]
where \(A\) and \(B\) are the magnitudes of vectors \(\vec{A}\) and \(\vec{B}\), respectively.
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