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The launching speed of a certain project...

The launching speed of a certain projectile is five times the speed it has at its maximum height.Its angles of projection is

A

`theta=cos^(-1)(0.2)`

B

`theta=sin^(-1)(0.2)`

C

`theta=tan^(-1)(0.2)`

D

`theta=0^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A
`u=5u sin theta rArr cos theta=1/5`
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