What is the condition for parallelism of two vectors ?

Explanation

To determine the condition for the parallelism of two vectors, we can follow these steps:

### Step 1: Understand the Definition of Parallel Vectors
Two vectors are said to be parallel if they point in the same direction or in exactly opposite directions. This means that the angle between them is either 0 degrees or 180 degrees.

### Step 2: Use the Cross Product
The cross product of two vectors \( \mathbf{A} \) and \( \mathbf{B} \) is given by the formula:
\[
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