107 727
Assignments Done
100%
Successfully Done
In April 2024
In April 2024
Your physics assignments can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result.
Physics
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Math
Our experts will gladly share their knowledge and help you with programming projects. Keep up with the world’s newest programming trends.
Programming
Answer to Question #45204 in 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?
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?
Expert's answer
Learn more about our help with Assignments: Engineering
Comments
Leave a comment