Question

14. The resultant of A and B is perpendicular to A.
What is angle between A and B ?​

Answer 1

Explanation:

∣A∣=2∣B∣

Tanβ=q+pcosθpsinθ

P=A,Q=B

β=900

01=B+AcosθAsinθ

B+Acosθ=0

AB=−cosθ

cosθ=−2BB=1200

hope it helps you ...