Average air temperature can be modulated by the sinusoidal equation T=T(avg) + T(amp)/2x sin[2[t(d)+10/365 - 1/12]-pi/12]
Search the Web or physics texts to find three other sinusoidal equations that model real-world phenomena.
How would I find one?

Question

Average air temperature can be modulated by the sinusoidal equation T=T(avg) + T(amp)/2x sin[2[t(d)+10/365 - 1/12]-pi/12]
Search the Web or physics texts to find three other sinusoidal equations that model real-world phenomena. 
How would I find one?

anonymous · Answer

Most systems models require a control model using sinusoidal dampening functions. One example is the position of an elevator when it reaches its destination floor; it experiences a sinusoidal transient response. I'm not sure what sinusoidal equation real-world model you would be looking for. Maybe AC current is a good exact sinusoidal-type behavior which does not experience gain or loss (without circuitry).

anonymous · Answer

Wow I think I'm going to use both of those examples, thank you c:

whpalmer4 · Answer

The last sentence on this web page has quite a few: http://dwb4.unl.edu/Chem/CHEM869M/CHEM869MMats/SinusoidalFns.html