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Q. For which of the following pair of angles, horizontal range is same ?

UP CPMTUP CPMT 2010Motion in a Plane

Solution:

Horizontal range is same for complementary angles i.e., $\theta$ and $90^{\circ} - \theta$ Hence, horizontal range is same for $40^{\circ}$ and $50^{\circ}$, i.e. $\left(90^{\circ}-40^{\circ}\right)$