The percentage in measurement of a physical \( \mathrm{P} \) quant...

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The percentage in measurement of a physical
\( \mathrm{P} \)
quantity \( m \), given by \( m=\pi \tan \theta \), is minimum when
W
(A) \( \theta=45^{\circ} \)
(B) \( \theta=90^{\circ} \)
(C) \( \theta=60^{\circ} \)
(D) \( \theta=30^{\circ} \)
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