Question

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Answer 1

$j = 1 \,\,\, c_{11}=sen\frac{\pi*1}{2}=sen\frac{\pi}{2} = sen45=\frac{ \sqrt{2}}{2} \\ \\ j = 2\,\,\,c_{12}=cos\frac{\pi*2}{3}=cos\frac{2\pi}{3}=cos120=-\frac{1}{2} \\ \\ j = 3\,\,\,c_{13}=sen\frac{\pi*3}{2}=sen\frac{3\pi}{2}=sen270=-1 \\ \\ j = 4\,\,\,c_{14}=cos\frac{\pi*4}{3}=cos240 = -\frac{1}{2}$

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