The Incredible Sine Wave and its Uses

The beautiful sine wave turns out to have a huge number of practical applications, from the motion of springs, to waves in the sea, to sound waves, light waves and more. It is curious that the function which defines the sine wave, sin(x), comes from comparing the lengths of sides in right-angled triangles – just about the least curvy things you could imagine. How does that concept result in the lovely curve of the sine wave? A lecture by Sarah Hart The transcript and downloadable ver...