asecd

computes the element-wise inverse secant of the argument, results in degree.

Calling Sequence

y = asecd(x)

Arguments

:x Real or complex array : :y Real or complex array :

Description

Computes the element-wise inverse secant of the argument, results in degree. For real input data with absolute value greater than 1 the results are real and in [-90 90] .

asecd(x) is equal to asec(x)*180/%pi.

Sample

Examples

x=[1 2 -2 `sqrt`_(2) -`sqrt`_(2) 2/`sqrt`_(3) -2/`sqrt`_(3) -1];
asecd(x)

See Also

• asec computes the element-wise inverse secant of the argument.
• secd Compute the element-wise secant of the argument given in degree.

References

• Kahan, W., “Branch cuts for complex elementary functions, or, Much ado about nothing’s sign bit”, Proceedings of the joing IMA/SIAM conference on The State of the Art in Numerical Analysis, University of Birmingham, A. Iserles and M.J.D. Powell, eds, Clarendon Press, Oxford, 1987, 165-210.