Question: Sketch the appropriate curves. A calculator may be used. The intensity I of an alarm (in dBdecibel) signal is given by I = 40 +

Sketch the appropriate curves. A calculator may be used. The intensity I of an alarm (in dB—decibel) signal is given by I = 40 + 50 sin t − 20 cos 2t, where t is measured in seconds. Display two cycles of I as a function of t on a calculator.

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