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[tex] \frac{3}{43\pi} (5arcctg(-1)+arcsin\frac{1}{2}+arctg(-\sqrt{3})) [/tex]
[tex] \frac{3}{43\pi} (5arcctg(-1)+arcsin\frac{1}{2}+arctg(-\sqrt{3})) [/tex]
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= 3/43π(5· 3π/4 + π/6 + (- π/3)) =
= 3/43π · (15π/4 + π/6 - π/3) =
= 3/43π · (45π/12 + 2π/12 - 4π/12) =
= 3/43π · 43π/12 = 3/12 = 1/4 = 0,25
Смотрим таблицу ниже.