Understanding the inversion of waves.
Understanding wave interference and wave pulse.
How to define an inverse.
Understanding electromagnetic waves.
How to find the speed of waves.
Understanding the concept of wave phase.
Understanding longitudinal waves.
Understanding wave beats.
Understanding transverse waves.
Understanding sound waves.
Understanding the concept of the intensity or energy of waves.
Understanding the different characteristics of waves.
Understanding standing waves.
How to find additive and multiplicative inverses.
How to tell if two variables vary inversely.
Understanding standing sound waves.
How to use algebra to show that two functions are inverses.
How to restrict the domain of sine so it will have an inverse function.
How to restrict the domain of cosine so it will have an inverse function.
How to restrict the domain of tangent so it will have an inverse function.