The resultant amplitude due to superposition of three simple harmonic motions \( x_{1}=3 \sin \o...

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The resultant amplitude due to superposition of three simple harmonic motions \( x_{1}=3 \sin \omega t \), \( x_{2}=5 \sin \left(\omega t+37^{\circ}\right) \) and \( x_{3}=-15 \cos \omega t \) is
(a) 18
(b) 10
(c) 12
(d) None of these
\( \mathrm{P} \)
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