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A particle is projected with a certain v...

A particle is projected with a certain velocity at an angle `alpha` above the horizontal from the foot of an inclined plane of inclination `30^@`. If the particle strikes the plane normally then `alpha` is equal to :

A

`30^(@)+tan^(-1) (sqrt(3)/2 )`

B

`45^(@)`

C

`60^(@)`

D

`30^(@) +tan^(-1) 2sqrt(3)`

Text Solution

Verified by Experts

The correct Answer is:
A
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