Question

If θ is the angle between two unit vectors a and b then 1/2 |a - b| = ?

A. cos θ/2

B. sin θ/2

C. tan θ/2

D. none of these

Answer 1

Answer is : B. sin θ/2

Given - vectors a and b are two unit vectors with an angle θ between them

To find - 1/2 |a - b|

Formula used - If a and b are two vectors then