Question

two vectors have equal magnitude and their resultant also has the same magnitude.what is the angle between the two vectors

Answer 1

Answer:

angle between two vectors is 150 degree

Explanation:

using R^2=(P^2+Q^2+2PQcos ω)

P=Q=R

P^2=2P^2+2P^2cosω

-P^2=2P^2Cosω

cosω=-(1/2)

ω=cos^-1(-0.5)

 Cos 90=0

Cos (150) = - 0.5