Question

Given that | ⃗P|= | ⃗Q ⃗|= | ⃗R ⃗| and P+Q+R=0 . If the angle between ⃗ ⃗P and ⃗Q is theta1 and the angle between ⃗ P and ⃗ ⃗R is theta2 . Then find a relation between theta1 and theta2 .

Answer 1

Answer:

please mark as brainliest answer and follow me and give thanks When, P+Q=R or P−R=−Q

(P−R).(P−R)=(−Q).(−Q)

P2+R2−2PRcosθ1=Q2

cosθ1=1/2  (as P=Q=R)

θ1=600

When, P+Q+R=0 or P+R=−Q

(P+R).(P+R)=(−