What is the sum from n=0 to infinity of cos((18)/n) ?

The sum from n=0 to infinity of cos((18)/n) is diverges

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sum from n=0 to infinity of cos((18)/n)

n = 0 \sum \infty cos (\frac{18}{n})

diverges

Solution steps

n = 1 \sum \infty cos (\frac{18}{n})

Apply Series Divergence Test:

diverges

= diverges

n = 3 \sum \infty \frac{5}{n ^{3}}

n = 1 \sum \infty (- \frac{1}{5})^{n - 1}

n = 1 \sum \infty (- 1)^{2 n - 1}

n = 0 \sum \infty \frac{1}{n ^{2} - 4}

k = 1 \sum \infty \frac{1}{7 ^{k} + 7}

What is the sum from n=0 to infinity of cos((18)/n) ?
The sum from n=0 to infinity of cos((18)/n) is diverges