Let the vectors be **a** and **b**
Compute the dot product: **a · b**
Compute the magnitudes: **|a|** and **|b|**
Use the formula: **cos θ = (a · b) / (|a||b|)**
Find the angle: **θ = arccos((a · b) / (|a||b|))**
Ensure **a** and **b** are not zero vectors
Keep the angle in the desired unit, degrees or radians