${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{R}{F_k}$

${\tan }^{-1}\frac{F_k}{R}$

${\tan }^{-1}\frac{F_k}{R^2}$