Question

If R vector = A vector + B vector where R vector , A vector and B vector are non zeroes vector. If magnitude of r=a=b then angle vector r and anlge vector a =

Answer 1

Explanation:

R=A=B  (given)

R=A2+B2+2ABcosθ

R2=A2+B2+2ABcosθ

⟹A2=A2+A2+2A2cosθ

⟹cosθ=2−1

⟹θ=120o