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Can anyone help me in this.
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File: dft.png (11 KB, 599x121) Image search: [iqdb] [SauceNao] [Google]
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Can anyone help me in this.
There's some kind of trick that I can't seem to find.
>>
>what is trigonometry
http://www.wolframalpha.com/input/?i=sin%28x%29*cos%28y%29

Back2School with you
>>
>>7810298
That isn't the problem. Computing 10-point dft is time consuming. There's somekind of trick in here
>>
DFT is a linear function, so I would write
$\displaystyle \cos \left ( \frac{3 \pi }{5}n \right ) \sin \left ( \frac{4 \pi }{5}n \right )= \frac{1}{2} \left ( \sin \left ( \frac{ \pi }{5}n \right )+ \sin \left ( \frac{7 \pi }{5}n \right ) \right )$
and sum the 10-point DFT for the two sine functions.