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A particle thrown at angle 45^0 with hor...

A particle thrown at angle `45^0` with horizontal with speed u has its range equal to R. At what angle should it be thrown with same speed for its range to be half of its initial value.

A

a. `60^0`

B

b. `30^0`

C

c. `15^0`

D

d. `70^0`

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