1. Definition
Two vectors are collinear ⇔ cross product 0 (x₁y₂=y₁x₂) ⇔ b=λa.
3. Properties & Laws
- Includes same/opposite direction;
- Zero vector collinear with all;
- Cross product 0;
- b=λa.
4. Steps
- Enter two vectors;
- Click "Check";
- Or click "Load Example".
5. Worked Examples
Example: (1,2),(3,6): cross 0, collinear, b=3a.
6. Common Pitfalls
Opposite allowed;
Zero special;
Use cross, not dot.