Question

Question #c6cc3

Answer 1

`tanx+cosx=1`

`=>sinx/cosx+cosx-1=0`

`=>sqrt(1-cos^2x)/cosx-(1-cosx)=0`

`=>sqrt(1-cosx)(sqrt(1+cosx)/cosx-sqrt(1-cosx))=0`

Taking

`sqrt(1-cosx)=0`

`=>cosx=1`

`=>x=2npi" where " n in ZZ`