Why sine and cosine functions are used in the derivatives of oscillation functions?

Asked by  | 30th Jan, 2009, 07:35: AM

Expert Answer:

Oscillatory motion is periodic in time. The simplest periodic function is a sin and cos function. So it is used to describe oscillatory motion.

This was shown by Fourier. His result is that:any periodic function can be expressed as a superposition of sine and cosine functions of different time periods with suitable coefficients.

Answered by  | 30th Jan, 2009, 11:51: AM

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