A) \[1\text{ }:\text{ }2\]
B) \[1\text{ }:\text{ }3~\]
C) \[1\text{ }:\text{ }4\]
D) \[1\text{ }:\text{ }1\]
Correct Answer: D
Solution :
[d] For complementary angles of projection \[(45{}^\circ +\alpha )\] and \[(45{}^\circ -\alpha )\] with same initial velocity u, range R is same. \[{{\theta }_{1}}+{{\theta }_{2}}=\left( 45{}^\circ +\alpha \right)+\left( 45{}^\circ -\alpha \right)=90{}^\circ \]
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