R=U2sin2a2 g\mathrm{R}=\frac{\mathrm{U}^{2} \sin 2 \mathrm{a}}{2 \mathrm{~g}}R=2 gU2sin2a
R=U2sin2a2 gR=\frac{U^{2} \sin ^{2} \mathrm{a}}{2 \mathrm{~g}}R=2 gU2sin2a
R=U2sin2agR=\frac{U^{2} \sin 2 a}{g}R=gU2sin2a
Rmax=2U2 g\mathrm{R}_{\max }=\frac{2 \mathrm{U}^{2}}{\mathrm{~g}}Rmax= g2U2
