Question

at what angle is ymax=range?

Answer 1

ymax=xmax
\[Vo ^{2}\sin^{2}\theta /2g =Vo ^{2}\sin2\theta /g \]
\[\sin^{2}\theta/2=2\sin \theta \cos \theta\]
\[\sin \theta / \cos \theta = 4\]
\[\tan \theta = 4\]
\[\theta = 75.96\]