1. If A and B are perpendicular (at 90 degrees to each other), the result of the dot product will be zero, because cos(Θ) will be zero.

2. If the angle between A and B are less than 90 degrees, the dot product will be positive (greater than zero), as cos(Θ) will be positive, and the vector lengths are always positive values.

3. If the angle between A and B are greater than 90 degrees, the dot product will be negative (less than zero), as cos(Θ) will be negative, and the vector lengths are always positive values.