Given that P=Q=R. If ๐+๐=๐‘. then the angle between ๐ ard ๐‘ is P_1 II ๐+๐+๐‘=0. then theang...

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Given that P=Q=R. If ๐+๐=๐‘. then the angle between ๐ ard ๐‘ is P_1 II ๐+๐+๐‘=0. then theangle hetween P^2 and R is ฮธ_2. What is the relation between ฮธ_1 and ฮธ_2 ?
(a) ฮธ_1=ฮธ_2
(b) ฮธ_1=ฮธ/2
(c) ฮธ_1=2 ฮธ_2
(d) None af these

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