Nawat N.

# How to find $u_{min}(d,r)$ if $xtan\theta - \frac{gx^2}{2u^2cos^2\theta} \geq r + \sqrt{r^2-(x-d)^2}$ for $d-r \leq x \leq d+r$

How to find umin(d,r) if xtanθ - (gx^2)/(2u2cos2θ) > r + √(r2-(x-d)2) for d-r < x < d+r ?
And 0 < θ < π/2 , d and r can be any positive real number which d >r