Question

\text { Find by direct integration the Fourier transform of the windowed cosine function } f(t)=p_{d}(t) \cos \omega_{0} t where, p_{d}(t)=\left\{\begin{array}{lll}

1 & \text { for } & |t|<\frac{1}{2} d \\

0 & \text { for } & |t|>\frac{1}{2} d

\end{array}\right.

Fig: 1

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