# A projectile is projected at an angle of 15° to the horizontal with speed v. If another projectile is projected with the same speed,then at what angle with the horizontal it must be projected so as yo have the same range?

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Note :- There are always two values of

we have range=

now let the angle be

then range=

simplifying we get=

we see that the range is same irrespective of the different time of flight'

so in the question given one angle

then the other angle is

**Note:- in this it was given that both the projectile have the same speed hence we can think both of them as a same projectile with different angles of projection.Never use this when the speeds are different.**

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