Physics · 2021
JEE Main · 26 August 2021, Shift 2 · Q7
The angle between vector ( A ) and ( A - B ) is:
The angle between vector $\displaystyle (\vec{A})$ and $\displaystyle (\vec{A}-\vec{B})$ is :

Official answer
(2)
$\displaystyle \tan ^{-1}\left(\frac{\sqrt{3} B}{2 A-B}\right)$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.