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## Homework Statement

Superposition of two cosine waves with different periods and different amplitudes.

## Homework Equations

This is basically:

acos(y*t) + bcos(x*t)

## The Attempt at a Solution

I looked at different trig functions but it seems it is not a standard solution. I've found solutions for different amplitudes (but the same periods) but am unable to find one for different amplitudes and periods.

Can anyone help?