Brandon launches a projectile at an angle of 75° above the horizontal, which strikes the ground a certain distance down range. For what other angle of launch at the same speed would the projectile land just as far away?

Question

8763 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-11-28T22:39:08

#15^@#

Complementary launch angles give the same range under the same conditions.

This means the two angles must add up to #90^@#.

So #90-75=15^@#

The maximum range is when the launch angle is #45^@#.