One strategy in a snowball fight is to throw
a snowball at a high angle over level ground.
While your opponent is watching this first
snowball, you throw a second one at a low
angle timed to arrive before or at the same
time as the first one. Assume both snowballs
are thrown with a speed of 33.3 m/s. The first
one is thrown at an angle of 55◦ with respect
to the horizontal.
At what angle should the second snowball
be thrown to arrive at the same point as the
first?