Question

What is the angle between the resultant vector and vector A?

• A. ${\cos }^{-1}\left(\frac{A-B}{A+B}\right)$
• B. ${\cos }^{-1}\left(\frac{B}{A}\right)$
• C. ${\cos }^{-1}\left(\frac{A}{B}\right)$
• D. zero

Answer 1

The correct option is D zero

Since R = 2A, R is parallel to A. Hence the correct choice is (a).