Объяснение:

1.

cos(x/3-π/2)=1

x/3-π/2=0+2πn,n∈z

x/3-π/2=2πn,n∈z

x/3=π/2+2πn,n∈z

x=3π/2+6πn,n∈z

2.

tgx/4=√3 ; x≠2π+4πn,n∈z

x/4=π/3+πn,n∈z

x=4π/3+4πn ; x≠2π+4πn,n∈z

x=4π/3+4πn,n∈z

3.

tg(x/3-√3)=0 ; x≠3π/2+3√3+3πn,n∈z

x/3-√3=0+πn,n∈z

x/3-√3=πn,n∈z

x/3=√3+πn,n∈z

x=3√3+3πn ; x≠3π/2+3√3+3πn,n∈z

x=3√3+3πn,n∈z