# The gracing projectile

There are two parallel planes, each inclined to the horizontal at an angle theta. A particle is projected from a point mid way between the foot of the two planes so that it grazes one of the planes and strikes the other at right angle. Find the angle of projection of projectile alpha.

Note by Parv Mor
4 years ago

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- 3 years, 9 months ago

$$tan^{-1}$$[($$\sqrt{2}$$-1)$$\cot \theta$$]+ $$\theta$$

- 3 years, 9 months ago

can you upload solution? becuase i got wrong answer ! Thanks @Parv Mor @Tushar Gopalka

- 3 years, 9 months ago

Yes, I too came across this problem but did not get the exact answer given....Still, I will solve once again and post the result soon

- 3 years, 9 months ago