A) \[\theta ={{45}^{o}}\]
B) \[\theta ={{\tan }^{-1}}4\left( \frac{1}{4} \right)\]
C) \[\theta ={{\tan }^{-1}}(4)\]
D) \[\theta ={{\tan }^{-1}}(2)\]
Correct Answer: C
Solution :
Given \[H=R,\frac{{{u}^{2}}{{\sin }^{2}}\theta }{2g}=\frac{2{{u}^{2}}\sin \theta \cos \theta }{g}\] \[\Rightarrow \]\[\tan \theta =4\Rightarrow \theta ={{\tan }^{-1}}(4)\]
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