sinαg\frac{\sin \alpha}{g}gsinα
u2sin2α2 g\frac{\mathrm{u}^{2} \sin ^{2} \alpha}{2 \mathrm{~g}}2 gu2sin2α
u2 g\frac{\mathrm{u}}{2 \mathrm{~g}}2 gu
u2sin2αg\frac{u^{2} \sin 2 \alpha}{g}gu2sin2α