Doubt regarding sine wave - its form,shape and oscillations

sine wave

Hey everyone!
i was studying about sine wave and had a question that "why a sine wave is in 360 degree? or we know the sine waveform". Why it is in that form? what make it oscillate above and below the origin?

thanks

sine wave

https://en.wikipedia.org/wiki/Sine_wave

Keith.

sine wave

Hi,
All periodic signals are in 360 degre(for one period)...
Refer pls for some schol stuff of physics_mechanical swinged lines...
K.

Re: sine wave

As you could see in
Illustrating the sine wave's fundamental relationship to the circle.
on wikipedia...

Its actually a plotting over the circle
consider r=sinΘ
now for all different values of Θ you will get different values of r..
now if you had to plot r versus Θ.. then one convenient way is to plot values of r (as the length of radius) from the center of the circle with corresponding values in angles Θ.

this is how those dots are formed....
now this representation is fairly good for one circle.. bit not for more as the points will get overlapped... plus it is hard to find phase diff, max amplitude, diff of amplitudes, making of a smooth curve, plotting more than 1 signals at a time... so on and so forth

so what we came up is a new idea.... plotting the same 'r' but not versus Θ, but versus increasing distance on x axis... this gives us the sine signal what we see.
that x axis could be labeled as anything but in higher studies (signals and systems) that variable (Independent variable) is usually taken as time though it may not be time in reality