Questions
Given that P=Q=R. If P+Q=R, then the angle between P and R is . If P+Q+R=0, then the angle between P and R is . What is the relation between and ?
a
θ1=θ2
b
θ1=θ22
c
θ1=2θ2
d
None of these
detailed solution
Correct option is B
P+Q=R and P=Q=RR=P2+Q2+2PQcosθSubstituting P=Q=R, we get θ=120°If P=Q, then R will pass through the centre of P and Q. Hence, angle between P and R will beθ1=θ2=60°In the second condition, given that P=Q=R and P+Q+R=0. Then, angle between P and R will be θ2=120°θ1=θ22Talk to our academic expert!
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