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Counter-Strike: Source (2004)

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A modulated signal \( C_{m}(t) \) has the form \( C_{m}(t)=30 \sin 300 \pi t \) \( +10(\cos 200 \pi t-\cos 400 \pi t) \). The carrier frequency \( f_{c} \), the modulating frequency (message frequency) \( f_{\omega} \) and the modulation index \( \mu \) are respectively given by
(a) \( f_{c}=200 H z ; f_{\omega}=50 H z ; \mu=\frac{1}{2} \)
(b) \( f_{c}=150 H z ; f_{\omega}=50 H z ; \mu=\frac{2}{3} \)
(c) \( f_{c}=150 H z ; f_{\omega}=30 H z ; \mu=\frac{1}{3} \)
(d) \( f_{c}=200 H z ; f_{\omega}=30 H z ; \mu=\frac{1}{2} \)
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