## Fourier Transform

I would like to take the Fourier Transform (time domain to frequency domain in radians) of:

$3sinc^2(60pi)t$

I am using the following transform:

$W/(2pi)sinc^2(Wt/2)t <===> delta(omega/(2W)$

I'm having trouble with the coefficient of delta, I got the frequency in radians as:

$omega/(240pi)$

Thanks