The resultant of two vectors A→ and B→ is perpendicular to the vector A→ and its magnitude is equal to half of the magnitude of vector B→ figure. The angle between A→ and B→ is

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120∘

150∘

135∘

None of these

answer is B.

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Detailed Solution

cos⁡β=RB=12⇒β=60∘ Angle between A→ and B→=90∘+β=150∘