# Cosine integral Ci(x) Calculator

## Calculates the cosine integral Ci(x). | ||||

Cosine integral Ci(x)

[1-7] /7 | Disp-Num |

- Purpose of use
- testing my own Scilab function
- Comment/Request
- Some sources indicate that Ci is not defined for arg(z) = pi. May be because it is a multivalued function. Indeed, Ci(-1 + 0.0000001i) and Ci(-1 - 0.0000001i) have very similar real parts but their imaginary parts differ by almost 2*pi

[1] 2020/02/06 16:08 60 years old level or over / A teacher / A researcher / Useful /

- Purpose of use
- Solve antenna’s exercise

[2] 2019/11/15 05:48 20 years old level / High-school/ University/ Grad student / A little /

- Purpose of use
- Graphing
- Comment/Request
- Good

[3] 2019/07/18 03:43 Under 20 years old / Elementary school/ Junior high-school student / Not at All /

- Purpose of use
- For teaching
- Comment/Request
- Very good. Many interesting things with recalculations and charts in one place.

[4] 2010/02/25 13:03 40 level / A teacher / Very /

- Purpose of use
- physics descriptor of a particle
- Comment/Request
- Thank you

[5] 2010/01/27 19:00 More than 60 / A researcher / Very /

- Comment/Request
- Very helpfully!

[6] 2009/09/02 06:33 More than 60 / A researcher / Very /

- Purpose of use
- doing homework
- Comment/Request
- a great site

[7] 2009/02/27 17:34 30 level / A specialized student / Very /

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