- #1
Albert1
- 1,221
- 0
the units of all angles :degree
gien :$tan\, x\,+tan\,(x+60)\,-\,tan(60-x)=3tan(3x)$
prove :$tan^2\, x\,+tan^2\,(x+60)\,+\,tan^2(60-x)=9tan^2(3x)+6$
gien :$tan\, x\,+tan\,(x+60)\,-\,tan(60-x)=3tan(3x)$
prove :$tan^2\, x\,+tan^2\,(x+60)\,+\,tan^2(60-x)=9tan^2(3x)+6$