Plot sine waves with Excel

During my study I had to draw and calculate sine waves pretty often. I used Excel to plot them and calculate their sums or product.

This first file calculates and plots 3 sine waves in the same chart from their function (amplitude, frequency, shift and offset):

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The second file calculates and plots 2 sine waves from their function and their product, very useful to see the usage of power when voltage and current are not in phase:

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The third file calculates and plots 2 sine waves from their function and their sum. It also plots the phasor diagram at 0 degrees:

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