angle*
2 parallel st. lines are inclined to the horizontal at an angle Î± .A particle is projected from a point midway between them so as to graze one of the linesand strike the other at right angle .If Î¸ be the nagle btwn direction of projection and either of the lines,then tanÎ¸ = (√2 1)cotÎ± .
Plz provide solution as well

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3 Answers
For now just take a hint. See the diagram and try to understand the equation that I m providing. You have to think the reason for every equation, and finally solve them to get the result.
These are the following equation you need for getting your result.
(u sinÎ¸)^{2}2g cosÎ±=d2.....(i)
T=u cosÎ±g sinÎ±........(ii)
d2=u sinÎ¸*T12*g cosÎ±T^{2}.........(iii)
Try to put the values from eq. (i) & (ii) in (iii) and solve.
 Anik Chatterjee in the second formula..wont it be..ucos(theeta)instead of ucos(alpha)..??Upvote·0· Reply ·20130227 02:06:08
 Akash Anand Yeah ..its a mistype .. In the second equation it will be u cos(theta) in place of u cos(alpha) Thank you Ankit.