Answer to Question #45204 in Other Engineering for Golden

Question #45204
1) Show that cos A * cos B = 0.5 [cos(A+B) + cos(A-B)] . Some English is essential in
addition to the algebra. Note that cosine is an even function so that cos(A-B) = cos(BA).
2) A mixer has a local oscillator at 1157 kHz and a bandpass filter centred at 455 kHz.
What are the centre frequencies of signals which would cause output from the filter?
How is it that a radio receiver accepts only one channel of input signal?
1
Expert's answer
2014-08-20T12:27:02-0400
The answer to the question is available in the PDF file https://www.assignmentexpert.com/homework-answers/engineering-answer-45204.pdf

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