Likning
Posted: 30/11-2006 12:31
2 [symbol:rot] (3)cos(2x-15)=3
[tex]cos(2x-15^o)={sqrt 3\over 2}[/tex]tosken wrote:2 [symbol:rot] (3)cos(2x-15)=3
[tex](2x-15^o)=\pm 30^o+k\cdot360^o[/tex]
[tex]x=-7.5^o+k\cdot 180^o[/tex]
eller
[tex]x=22.5^o+k\cdot 180^o[/tex]