A) \[{{90}^{o}}\]
B) \[{{180}^{o}}\]
C) \[{{60}^{o}}\]
D) \[{{75}^{o}}\]
Correct Answer: A
Solution :
[a] Range\[=\frac{{{u}^{2}}\sin 2\theta }{g}\]; when \[\theta =90{}^\circ \], \[R=0\] i.e. the body will fall at the point of projection after completing one dimensional motion under gravity.
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