23 lines
661 B
Ruby
23 lines
661 B
Ruby
require 'facets/math/acoth'
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require 'facets/math/coth'
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require 'facets/numeric/range' # used to test within a precision
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test_case Math do
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class_method :acoth do
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test do
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Math.acoth(1.5).range(1.0e-6).assert === 0.5 * Math.log(5.0)
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Math.acoth(5.0).range(1.0e-6).assert === 0.5 * Math.log(1.5)
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end
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# 1.0e-6
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test "check complementarity of acoth and coth" do
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Math.acoth(Math.coth( 1.5)).range(1.0e-6).assert === 1.5
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Math.coth(Math.acoth( 1.5)).range(1.0e-6).assert === 1.5
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Math.acoth(Math.coth(-1.5)).range(1.0e-6).assert === -1.5
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Math.coth(Math.acoth(-1.5)).range(1.0e-6).assert === -1.5
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end
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end
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end
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