The voltage of an ac source varies with time according to the equation \( V=100 \sin 100 \pi t \...

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The voltage of an ac source varies with time according to the equation \( V=100 \sin 100 \pi t \cos 100 \pi t \) where \( t \) is in seconds and \( V \) is in volts. Then,
(A) The peak voltage of the source is \( 100 \mathrm{~V} \)
(B) The peak voltage of the source is \( 50 \mathrm{~V} \)
(C) The peak voltage of the source is \( 100 / \sqrt{2} \)
(D) The frequency of the source is \( 50 \mathrm{~Hz} \)
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