Hello Everyone!

I think my question would go here. Is there a method to find the period of a given periodic function? Say: $\displaystyle f(t)=\cos (2\pi f_a t)\cos (2\pi f_b t)$ where b is not necessarily an integer multiple of a

Thanks!

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- Oct 1st 2011, 10:51 PMrebghbFinding the period of a periodic function
Hello Everyone!

I think my question would go here. Is there a method to find the period of a given periodic function? Say: $\displaystyle f(t)=\cos (2\pi f_a t)\cos (2\pi f_b t)$ where b is not necessarily an integer multiple of a

Thanks! - Oct 5th 2011, 07:45 AMBookEnquiryRe: Finding the period of a periodic function
Is this anything to do with wiki: Beat (acoustics)?

2 cos (2丌f at) cos (2丌f bt) = cos (2丌f a -2丌f b)t + cos (2丌f a +2丌f b)t

f beat = f1 - f2

f beat = (f a +f b) - (f a - f b) = 2f b

period, T = 1/(2f b)? Is it? - Oct 5th 2011, 11:10 AMCaptainBlackRe: Finding the period of a periodic function