ステップ4: ( V_3 ) と ( \phi ) の求解[ V_3 = \sqrt{A^2 + B^2} = \sqrt{(V_1 \cos(\theta_1) + V_2 \cos(\theta_2))^2 + (V_1 \sin(\theta_1) + V_2 \sin(\theta_2))^2} ][ \phi = \tan^{-1} \left( \frac{B}{A} \right) = \tan^{-1} \left( \frac{V_1 \sin(\theta_1) + V_2 \sin(\theta_2)}{V_1…