Question

If the angle between the vectors a and b be θ and $\mathbf { a } \cdot \mathbf { b } = \cos \theta$ then the true statement is

• A. a and b are equal vectors
• B. a and b are like vectors
• C. a and b are unlike vectors
• D. a and b are unit vectors

Answer 1

Answer: (D)

a and b are unit vectors

Answer 2

Obviously $\mathbf { a } , \mathbf { b }$are unit vectors.