Найдите значение выражения: а)arctg(-1)-arctg1
б)arcsin(-1/2)-arctg√3 в)arcsin(-1)-arccos(-√2/2)
г)arcsin1+arcctg√3
б)arcsin(-1/2)-arctg√3 в)arcsin(-1)-arccos(-√2/2)
г)arcsin1+arcctg√3
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а)π/2
б)-π/3
в)-5π/4
г)2π/3