Answer: a / |a|.
- A a / |a|
- B a x |a|
- C a - |a|
- D a + |a|
Correct answer: A. a / |a|
Explanation: To find a unit vector in the direction of a, divide the vector by its magnitude: a<sub>hat</sub> = a / |a|.
Triangle law of vector addition: placing vector b at the head of vector a, the diagonal from the start to the final head gives the resultant a + b.
Concept context
Vectors, dot product, cross product, and geometric applications