square sine wave

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• September 28th 2009, 01:30 PM
rainer
square sine wave
Does anyone know the formula for a square sine wave?

Thanks
• September 28th 2009, 01:50 PM
adkinsjr
Quote:

Originally Posted by rainer
Does anyone know the formula for a square sine wave?

Thanks

I'm not sure what you mean by "squared sine wave". The identity $sin^2\theta +cos^2\theta=1$ gives $sin^2\theta =1-cos^2\theta$. Is this what you're looking for?
• September 29th 2009, 05:43 AM
rainer
No, I mean square like in the attached picture.
• September 30th 2009, 04:04 AM
mr fantastic
Quote:

Originally Posted by rainer
No, I mean square like in the attached picture.

There are many ways to define a square wave. Read

Fourier Series--Square Wave -- from Wolfram MathWorld