Задача 19. Расположите в порядке возрастания числа:   \({\text{tg}}\dfrac{\pi }{5};\,\,\,\,{\text{tg}}\dfrac{{2\pi }}{5};\,\,\,{\text{tg}}\dfrac{{4\pi }}{5}\)

1) \({\text{tg}}\dfrac{\pi }{5};\,\,\,\,{\text{tg}}\dfrac{{2\pi }}{5};\,\,\,{\text{tg}}\dfrac{{4\pi }}{5}\) 2) \({\text{tg}}\dfrac{\pi }{5};\,\,\,\,{\text{tg}}\dfrac{{4\pi }}{5};\,\,\,{\text{tg}}\dfrac{{2\pi }}{5}\)
3) \({\text{tg}}\dfrac{{2\pi }}{5};\,\,\,\,{\text{tg}}\dfrac{\pi }{5};\,\,\,{\text{tg}}\dfrac{{4\pi }}{5}\) 4) \({\text{tg}}\dfrac{{2\pi }}{5};\,\,\,\,{\text{tg}}\dfrac{{4\pi }}{5};\,\,\,{\text{tg}}\dfrac{\pi }{5}\)
5) \({\text{tg}}\dfrac{{4\pi }}{5};\,\,\,\,{\text{tg}}\dfrac{\pi }{5};\,\,\,{\text{tg}}\dfrac{{2\pi }}{5}\) 6) \({\text{tg}}\dfrac{{4\pi }}{5};\,\,\,\,{\text{tg}}\dfrac{{2\pi }}{5};\,\,\,{\text{tg}}\dfrac{\pi }{5}\)

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