1. arcsin√2/2

2. arcsin (-1/2)

3. arccos (-1/2)

4. arctg√3

5. sin2x=√2/2

6. cos3x=1

7. tgx/2=1

8. ctg4x=0

1. arcsin√2/2=π/4

2. arcsin (-1/2) = - π/4

3. arccos (-1/2) = 2π/3

4. arctg√3=π/3

5. sin2x=√2/2

2x = (-1) ^n*π/4+πn

x = (-1) ^n*π/8+πn / 2

6. cos3x=1

3x=2πn

x=2πn/3

7. tgx/2=1

x/2=π/4+πn

x=π/2+2πn

8. ctg4x=0

4x=π/2+πn

x=π/8+πn/4