# Manuals/calci/CIS

**CIS (Theta)**

- is the angle value.

## Description

- This function gives the CIS value.
- CIS is another name for the complex exponential.
- , where is the function, is the imaginary unit and is the function.
- Also ;
- and =-1.
- So abbreviates .

## Examples

- CIS(45) = 0.5253219888177297+i 0.8509035245341184
- CIS(180) = -0.5984600690578581-i-0.8011526357338304
- CIS(90.53) = -0.838546204483341+ⅈ0.5448304901036493

## Related Videos

## See Also

## References