Question

5. Two vectors A and B have equal
magnitudes. Then the vector “A+B and
A-B are oriented at an angle of;​

Answer 1

Explanation:

A+B∣=n∣A−B∣

⟹(A2+B2+2ABcosθ)=n2(A2+B2−2ABcosθ)

It is given that A+B

Hence cosθ=n2+1n2−1

⟹θ=cos−1(n2+1n2−1)