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[tex]Sin(45-30) = Sin45 \cdot Cos30 - Cos45 \cdot sin30[/tex]
[tex]Sin(15) = \frac{\sqrt{2}}{2} \cdot \frac{\sqrt{3}}{2} - \frac{sqrt{2}}{2} \cdot \frac{1}{2}[/tex]
[tex]Sin15 = \frac{\sqrt{6}}{4} - \frac{\sqrt{2}}{4}[/tex]
[tex]Sin15 = \frac{\sqrt{6} - \sqrt{2}}{4}[/tex]
[tex]Sin15 = ca. 0,259[/tex] !!
1000 takk for hjelpen alle!!