`tan(3x)tan(x-1)=0`

solving each part,

tan(3x)=0

General solutions for tan(3x)=0 are,

`3x=0+pin`

`x=(pin)/3`

General solutions for tan(x-1)=0 are,

`x-1=0+pin`

`x=1+pin`

so the solutions are,

`x=(pin)/3 , x=pin+1`

`tan(3x)tan(x-1)=0`

solving each part,

tan(3x)=0

General solutions for tan(3x)=0 are,

`3x=0+pin`

`x=(pin)/3`

General solutions for tan(x-1)=0 are,

`x-1=0+pin`

`x=1+pin`

so the solutions are,

`x=(pin)/3 , x=pin+1`