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A projectile is launched at an angle of ...

A projectile is launched at an angle of `theta` above the horizontal The elevation angle `alpha` of the highest point of the trajectory as seen from the launching position is given by

A

`tan alpha = 1/2 tan theta`

B

`sin alpha = 1/2 sin theta`

C

`tan alpha = tan theta/2`

D

`sin alpha = sin theta/2`

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