@testset "6 Hyperbolic functions" begin
    include("6.1 Hyperbolic sine/.jl")
    include("6.2 Hyperbolic cosine/.jl")
    include("6.3 Hyperbolic tangent/.jl")
    include("6.4 Hyperbolic cotangent/.jl")
    include("6.5 Hyperbolic secant/.jl")
    include("6.6 Hyperbolic cosecant/.jl")
    include("6.7 Miscellaneous/.jl")
end
