Mathematical Tools_JEE Main 2021_{S2}_200721 - Competishun – Live JEE & NEET Courses and Exam Prep

JEE MAIN 2021

20-07-21 S2

Question

Two vectors $\vec{P}$ and $\vec{Q}$ have equal magnitudes. If the magnitude of $\vec{P}+\vec{Q}$ is $n$ times magnitude of $\vec{P}-\vec{Q}$, then angle between $\vec{P}$ and $\vec{Q}$ is :

Select the correct option:

$\sin ^{-1}\left(\frac{n-1}{n+1}\right)$

$\cos ^{-1}\left(\frac{n-1}{n+1}\right)$

$\sin ^{-1}\left(\frac{n^2-1}{n^2+1}\right)$

$\cos ^{-1}\left(\frac{n^2-1}{n^2+1}\right)$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Question Tags

JEE Main

Physics

Easy

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