What is the sum from n=0 to infinity of cos^2(n) ?

The sum from n=0 to infinity of cos^2(n) is diverges

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sum from n=0 to infinity of cos^2(n)

n = 0 \sum \infty cos^{2} (n)

diverges

Solution steps

n = 0 \sum \infty cos^{2} (n)

Apply Series Divergence Test:

diverges

= diverges

\frac{d}{d x} (\frac{x}{a} + \frac{a}{x})

\frac{\partial}{\partial x} (2 x^{\frac{1}{2}})

\frac{d}{d y} (4 y^{3})

\int_{0}^{9} (2 x^{3} + 1) d x

\frac{d}{d x} (3 x^{2} - 1)

What is the sum from n=0 to infinity of cos^2(n) ?
The sum from n=0 to infinity of cos^2(n) is diverges