asec

Inverse secant in radians

Usage

asec(A)

• A should be an array, which can be real or complex.
• It returns an array containing the inverse secant (in radians) of each element of A.
• For real elements of A lying in $(-1,1)$, it returns complex numbers. See example below.
• The output has the same size as A.

Example

Input

• asec(A) gives a complex number when abs(A) is smaller than 1.

x = linspace(-1,1,8)
asec(x)

Output

x = 
-1.0000000  -0.7142857  -0.4285714  -0.1428571   0.1428571   0.4285714   0.7142857   1.0000000

ans = 
Columns 1 to 3:
 3.1415927 + 0.0000000i   3.1415927 + 0.8670147i   3.1415927 + 1.4909963i
Columns 4 to 6:
 3.1415927 + 2.6339158i   0.0000000 + 2.6339158i   0.0000000 + 1.4909963i
Columns 7 to 8:
 0.0000000 + 0.8670147i   0.0000000 + 0.0000000i