What is the angle between $\overrightarrow{\mathrm{P}}$ and the resultant of $(\overrightarrow{\mathrm{P}}+\overrightarrow{\mathrm{Q}})$ and $(\overrightarrow{\mathrm{P}}-\overrightarrow{\mathrm{Q}})$?

• A

  Zero

• B

  ${\tan }^{-1}\left(\frac{\mathrm{P}}{\mathrm{Q}}\right)$

• C

  ${\tan }^{-1}\left(\frac{\mathrm{Q}}{\mathrm{P}}\right)$

• D

  ${\tan }^{-1}(\mathrm{P}-\mathrm{Q})(\mathrm{P}+\mathrm{Q})$