What is the angle between $\overrightarrow P$ and the resultant of $(\overrightarrow P + \overrightarrow Q)$ and $(\overrightarrow P - \overrightarrow Q)$?
- AZero
- B$\tan^{-1}(P/Q)$
- C$\tan^{-1}(Q/P)$
- D$\tan^{-1}((P - Q)/(P + Q))$
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