arcsin(-1)-3/2arccos1/2+3arcctg(корень-3/3)=? Cos(arcctg 0) =?...

Question

arcsin(-1)-3/2arccos1/2+3arcctg(корень-3/3)=?

Cos(arcctg 0) =?

Ctg(arcctg(1))=?

Cos(arcctg(-1))=?

Ctg(2arcctg(-1/корень3))=?

Answer 1

Arcctg0 = П/2
arcctg1 = П/2
arcctg (-1) = 3П/4