Explanation: 
Another Explanation (5): ```html
Explanation:
Given, \(\vec{C} = \vec{A} \times \vec{B}\) and \(\vec{D} = \vec{B} \times \vec{A}\).
We know that the cross product is anti-commutative, meaning:
\[\vec{B} \times \vec{A} = -(\vec{A} \times \vec{B})\]
So, \(\vec{D} = - \vec{C}\). 😮
This implies that \(\vec{D}\) is a vector pointing in the opposite direction of \(\vec{C}\).
The angle between two vectors pointing in opposite directions is 180°. 🤩
Therefore, the angle between \(\vec{C}\) and \(\vec{D}\) is 180°. 🎉
```
