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Q.

A projectile is fired at an angle of \(45^\circ\) with the horizontal.

Elevation angle of the projectile at its highest  point as seen from the point of projection is 

(a) \(tan^{-1} (\frac {\sqrt 3}{2})\)

(b) \(45^\circ\)

(c) \(60^\circ\)

(d) \(tan^{-1} \frac{1}{2}\)