The magnitude of vectors \( \overrightarrow{OA} \), \( \overrightarrow{OB} \) and \( \overrightarrow{OC} \) in the given figure are equal. The direction of \( \overrightarrow{OA} + \overrightarrow{OB} - \overrightarrow{OC} \) with x-axis will be:
\( \tan^{-1}\!\left(\dfrac{1-\sqrt{3}-\sqrt{2}}{1+\sqrt{3}+\sqrt{2}}\right) \)
\( \tan^{-1}\!\left(\dfrac{1+\sqrt{3}-\sqrt{2}}{1-\sqrt{3}-\sqrt{2}}\right) \)
\( \tan^{-1}\!\left(\dfrac{\sqrt{3}-1+\sqrt{2}}{1+\sqrt{3}-\sqrt{2}}\right) \)
\( \tan^{-1}\!\left(\dfrac{\sqrt{3}-1+\sqrt{2}}{1-\sqrt{3}+\sqrt{2}}\right) \)
