Аналитическая геометрия и линейная алгебра. Умнов А.Е. - 82 стр.

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                                    y = R sin τ , τ ∈ ( −∞,+∞) ÒãÒÎË                                      
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                          x    Fx (ϕ , θ )
                          y = Fy (ϕ , θ )  Ë Fx (ϕ , θ ) , Fy (ϕ , θ ) , Fz (ϕ , θ )   Ó˹¯Ë¯©mÓ©Ë °}È
                          z    Fz (ϕ , θ )
                         㫯өË Á‚Ó}ÒÒ m‚² ȯ‚äËӈºm ϕ , θ   º¹¯ËËãËÓÓ©Ë ã« ϕ , θ ∈Ω 
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