약 20

약 30

약 40

약 50

$$x = \left( \dfrac{\cos \theta_1}{\sqrt{1-\cos^2 \theta_1}}-\dfrac{\cos \theta_2}{\sqrt{1-\cos^2 \theta_2}} \right)P_1$$

$$x = \left( \dfrac{\cos \theta_2}{\sqrt{1-\cos^2 \theta_2}}-\dfrac{\cos \theta_1}{\sqrt{1-\cos^2 \theta_1}} \right)P_1$$

$$x = \left( \dfrac{\sqrt{1-\cos^2 \theta_2}}{\cos \theta_2}-\dfrac{\sqrt{1-\cos^2 \theta_1}}{\cos \theta_1} \right)P_1$$

$$x = \left( \dfrac{\sqrt{1-\cos^2 \theta_1}}{\cos \theta_1}-\dfrac{\sqrt{1-\cos^2 \theta_2}}{\cos \theta_2} \right)P_1$$

1754

2308

0.76

0.65