Question

The range of a projectile is R when the angle of projection is 40°. For the same velocity of projection and range, the other possible angle of projection is

Moderate

Solution

Range of projectile is same for $θ$ and 90° - $θ$ .
Given, $θ$ = 40°
Another angle = 90° - $θ$ = 90° - 40° = 50°

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