This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
R = u² sin 2Ф1 / g = u² sin (180 - 2Ф1) / g = u² sin 2(90-Ф1) /g

R is same for Ф1 and 90-Ф1.

H1 = R tanФ1 /4

H2 = R tan (90-Ф1) /4 = R /4 tanФ1

H1 H2 = R² / 16

2 5 2
click on thank you and on stars to rate the answer as brainliest