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RFC: add support for computing the inverse/arc secant (asec) #231

@kgryte

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Description

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This RFC proposes adding support for computing the inverse (arc) secant. The initial implementation is straightforward:

return acos( 1.0 / x );

Package: @stdlib/math/base/special/asec
Alias: base.asec

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Reference implementations:

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FeatureIssue or pull request for adding a new feature.Good First IssueA good first issue for new contributors!Help WantedExtra attention is needed.MathIssue or pull request specific to math functionality.RFCRequest for comments. Feature requests and proposed changes.difficulty: 1Low degree of difficulty. Should be straightforward to implement and/or resolve.

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