asecd
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Name

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

Calling Sequence

y = asecd(x)

Parameters

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.

Examples

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

See Also

asec, secd

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.

Authors

Serge Steer, INRIA
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