arctg (-1)-arctg 1=3pi/4-pi/4=2pi/4=pi/2
arcsin( -1)-arccos (-√2/2)=3pi/2-3pi/4=6pi/4-3pi/4=3pi/4
arcsin (-1/2)-arctg 1/√3=7pi/6-pi/6=6pi/6=pi
arcsin 1+arcctg √3=pi/2+pi/3=3pi/6+2pi/6=5pi/6
1)3π/4-π/4=2pi/4=π/22)3π/2-3π/4=6π/4-3π/4=3π/43)7π/6-π/6=6π/6=π4)π/2+π/3=3π/6+2π/6=5π/6
arctg (-1)-arctg 1=3pi/4-pi/4=2pi/4=pi/2
arcsin( -1)-arccos (-√2/2)=3pi/2-3pi/4=6pi/4-3pi/4=3pi/4
arcsin (-1/2)-arctg 1/√3=7pi/6-pi/6=6pi/6=pi
arcsin 1+arcctg √3=pi/2+pi/3=3pi/6+2pi/6=5pi/6
1)3π/4-π/4=2pi/4=π/2
2)3π/2-3π/4=6π/4-3π/4=3π/4
3)7π/6-π/6=6π/6=π
4)π/2+π/3=3π/6+2π/6=5π/6