Re: Trigonometry is not about triangles...
sin, cos, tan and the reciprocals and derivative are used heavly in design and describing AC circuits which includes audio and radio circuits and basically any circuit which has a signal. After all sin describes a pure AC signal or audio wave hence sine wave.
To be honest I found the maths far to difficult just have a look at wikipedia https://en.wikipedia.org/wiki/Trigonometric_functions and scroll down
I found using matrices to solve simultaneous equations with more than two unknowns to be much easier to get my head round not that I can remember how now.
For example GPS uses trigonometric functions for the radio waves aspect, trigonometry to calculate your position using simultaneous equations to solve the 4 unknowns of your position in x, y, z and time.
Biting the hand that feeds IT
