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A particle at a height h from the ground is projected with an angle of 30 from the horizontal  strikes the ground making an angle of 45 with horizontal . It is again projected from the same point bit now with an of 60 with horizontal find the angle it makes with horizontal when it strikes the ground.
 
(A) tan inverse 4
(B) tan inverse 5
(C) tan inverse root 5
(D) tan inverse root 3
one year ago

Answers : (2)

Eshan
askIITians Faculty
2095 Points
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one year ago
hi bye
13 Points
							
Using v = 2u2ghv = 22u sin2gh(vertical comp. when striking) Now tan 45° = 1u cos= 22u sin2ghu2cos2 = u2sin2 + 2gh ......(1)u23144= 2ghu2= 4ghu = 2gh; tan= THvv=34gh.2gh412 gh2=5ghgh=5
 
 
i do not knoew the ans 

 
one month ago
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