# Cosine integral Ci(x)

## Calculates the cosine integral Ci(x).

 $Ci(x)={\large\int_{\small 0}^{\hspace{25}\small x}\frac{cos(t)-1}{t}}dt+ln(x)+\gamma$
 x
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 $\normal Sine\ integral\ Si(x)\\\hspace{60} and\ cosine\ integral\ Ci(x)\\[10](1)\ Si(x)={\large\int_{\small 0}^{\hspace{25}\small x}\frac{sin(t)}{t}}dt\\(2)\ Ci(x)={\large\int_{\small 0}^{\hspace{25}\small x}\frac{cos(t)-1}{t}}dt+ln(x)+\gamma\\$

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