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Likning

Posted: 30/11-2006 12:31
by tosken
2 [symbol:rot] (3)cos(2x-15)=3

Re: Likning

Posted: 30/11-2006 13:35
by Janhaa
tosken wrote:2 [symbol:rot] (3)cos(2x-15)=3
[tex]cos(2x-15^o)={sqrt 3\over 2}[/tex]

[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]