5.8.7 The cosine integral function: Ci
The cosine integral function is defined by
and Ci(0) = −∞, Ci(−∞) = iπ and
Ci(+∞) = 0.
The Ci command computes the cosine integral function.
-
Ci takes one argument:
z, a complex number.
- Ci(z) returns the value of the cosine integral function
Ci(z).
Examples.
-
Input:
Ci(1.0)
Output:
- Input:
Ci(-1.0)
Output:
0.337403922901+3.14159265359 i
|
- Input:
Ci(1.0) - Ci(-1.0)
Output: