There is a vertical pole perpendicular to the horizontal plane. From point P on the plane, 2 projectiles are fired simultaneously at different velocities. The first projectile is fired at an angle of 30o and it hits the foot of the pole. The second projectile is fired at an angle of 60o and it hits the top of the pole
It is further known that the projectiles hit the pole at the same time.
Find the angle subtended by the pole from P.
i write it with Wordpad but when i copypaste to perplexus all was a mess. That's why a 3 went up instead of down.
But anyway I don't know why I get two times 16.10° as arctg . Probably some devil in my android calculator app.
update: ok no devil. I give tg 60 =sqrt 3/2 instead of sqrt 3. That is why I get good solution but bad figure in arctg
Edited on March 24, 2018, 4:45 pm
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Posted by armando
on 2018-03-24 15:01:05 |
two errors
