Q .     Five sinusoidal waves have the same frequency 500Hz but their amplitudes are in the ratio `2:\frac{1}{2}:\frac{1}{2}:1:1` and their phase angles `0,\frac{\pi}{6},\frac{\pi}{3},\frac{\pi}{2}` and `\pi` respectively. The phase angle of resultant wave obtained by the superposition of these five waves is:

AIIMS 2010
A

`30^{o}`

B

`45^{o}`

C

`60^{o}`

D

`90^{o}``

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