\[(a)\;\alpha=\tan ^{-1} 1/4 \quad (b)\;\alpha=\tan ^{-1} 1/2 \quad (c)\;\alpha=\tan ^{-1} 2 \quad (d)\;\alpha=\tan ^{-1} 4\]

Want to ask us a question? Click here

Browse Questions

Ad |

0 votes

0 votes

$H=\large\frac{u^2 \sin ^2 \alpha}{2g}$=Greatest height

$R=\large\frac{u^2 \sin 2 \alpha}{g}$ =Horizontal range

$H=R$

$\quad=>\large\frac{\sin \alpha}{2}$$=2 \sin \alpha \cos \alpha $

$\quad=>\large\frac{\sin \alpha}{\cos \alpha}$$=4=> \tan \alpha=4$

$\quad=>\tan \alpha=4$

$\quad=>\alpha=\tan ^{-1}4$

Hence d is the correct answer.

Ask Question

Take Test

x

JEE MAIN, CBSE, AIPMT Mobile and Tablet App

The ultimate mobile app to help you crack your examinations

...