What is the sum from n=1 to infinity of cos(pi/n) ?

The sum from n=1 to infinity of cos(pi/n) is diverges

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sum from n=1 to infinity of cos(pi/n)

n = 1 \sum \infty cos (\frac{π}{n})

diverges

Solution steps

n = 1 \sum \infty cos (\frac{π}{n})

Apply Series Divergence Test:

diverges

= diverges

n = 1 \sum \infty \frac{e ^{n}}{n ^{5}}

k = 3 \sum \infty \frac{1}{2 ^{k - 1}}

n = 0 \sum \infty \frac{n}{( 1 + 4 n ) ^{2}}

n = 1 \sum \infty cos (8 n)

n = 0 \sum \infty n^{^{'}}

What is the sum from n=1 to infinity of cos(pi/n) ?
The sum from n=1 to infinity of cos(pi/n) is diverges