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cos(pi/100*n)

Suma de la serie cos(pi/100*n)



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Solución

Ha introducido [src]
  80            
 ___            
 \  `           
  \      / pi  \
   )  cos|---*n|
  /      \100  /
 /__,           
n = 1           
$$\sum_{n=1}^{80} \cos{\left(n \frac{\pi}{100} \right)}$$
Sum(cos((pi/100)*n), (n, 1, 80))
Velocidad de la convergencia de la serie
Respuesta [src]
                              ___________              ___________                                                                                                                                                                                                                                       
                             /       ___              /       ___          /      ___\         /      ___\                                                                                                                                                                                               
     ___________     ___    /  5   \/ 5       ___    /  5   \/ 5       ___ |1   \/ 5 |     ___ |1   \/ 5 |                                                                                                                                                                                               
    /       ___    \/ 2 *  /   - - -----    \/ 2 *  /   - + -----    \/ 2 *|- + -----|   \/ 2 *|- - -----|                                                                                                                                                                                               
   /  5   \/ 5           \/    8     8            \/    8     8            \4     4  /         \4     4  /      /pi\      /pi\      / pi\      /2*pi\      /3*pi\      /3*pi\      /3*pi\      /4*pi\      /7*pi\      /7*pi\      /9*pi\      /9*pi\      /11*pi\      /13*pi\      /17*pi\      /19*pi\
  /   - + -----  + ---------------------- + ---------------------- + ----------------- - ----------------- + cos|--| + cos|--| + cos|---| + cos|----| + cos|----| + cos|----| + cos|----| + cos|----| + cos|----| + cos|----| + cos|----| + cos|----| + cos|-----| + cos|-----| + cos|-----| + cos|-----|
\/    8     8                2                        2                      2                   2              \25/      \50/      \100/      \ 25 /      \ 25 /      \ 50 /      \100 /      \ 25 /      \ 50 /      \100 /      \ 50 /      \100 /      \ 100 /      \ 100 /      \ 100 /      \ 100 /
$$- \frac{\sqrt{2} \left(\frac{1}{4} - \frac{\sqrt{5}}{4}\right)}{2} + \frac{\sqrt{2} \sqrt{\frac{5}{8} - \frac{\sqrt{5}}{8}}}{2} + \frac{\sqrt{2} \left(\frac{1}{4} + \frac{\sqrt{5}}{4}\right)}{2} + \frac{\sqrt{2} \sqrt{\frac{\sqrt{5}}{8} + \frac{5}{8}}}{2} + \cos{\left(\frac{19 \pi}{100} \right)} + \cos{\left(\frac{9 \pi}{50} \right)} + \cos{\left(\frac{17 \pi}{100} \right)} + \cos{\left(\frac{4 \pi}{25} \right)} + \cos{\left(\frac{7 \pi}{50} \right)} + \cos{\left(\frac{13 \pi}{100} \right)} + \cos{\left(\frac{3 \pi}{25} \right)} + \cos{\left(\frac{11 \pi}{100} \right)} + \sqrt{\frac{\sqrt{5}}{8} + \frac{5}{8}} + \cos{\left(\frac{9 \pi}{100} \right)} + \cos{\left(\frac{2 \pi}{25} \right)} + \cos{\left(\frac{7 \pi}{100} \right)} + \cos{\left(\frac{3 \pi}{50} \right)} + \cos{\left(\frac{\pi}{25} \right)} + \cos{\left(\frac{3 \pi}{100} \right)} + \cos{\left(\frac{\pi}{50} \right)} + \cos{\left(\frac{\pi}{100} \right)}$$
sqrt(5/8 + sqrt(5)/8) + sqrt(2)*sqrt(5/8 - sqrt(5)/8)/2 + sqrt(2)*sqrt(5/8 + sqrt(5)/8)/2 + sqrt(2)*(1/4 + sqrt(5)/4)/2 - sqrt(2)*(1/4 - sqrt(5)/4)/2 + cos(pi/25) + cos(pi/50) + cos(pi/100) + cos(2*pi/25) + cos(3*pi/25) + cos(3*pi/50) + cos(3*pi/100) + cos(4*pi/25) + cos(7*pi/50) + cos(7*pi/100) + cos(9*pi/50) + cos(9*pi/100) + cos(11*pi/100) + cos(13*pi/100) + cos(17*pi/100) + cos(19*pi/100)
Respuesta numérica [src]
17.8037383350800920676355189575
17.8037383350800920676355189575
Gráfico
Suma de la serie cos(pi/100*n)

    Ejemplos de hallazgo de la suma de la serie