Trigonometri
Posted: 28/11-2006 22:31
Vis at sin(x+30) = [symbol:rot] (3/2 )sinx + 0.5 cos x
[tex]u = \sin (x + 30) = \sin x \cdot \cos 30 + \cos x \cdot \sin 30[/tex]
[tex]\cos 30 = \frac{sqrt 3}{2},\ \sin 30 = \frac{1}{2}[/tex]
[tex]u = \frac{sqrt 3 \sin x}{2} + \frac{1}{2} \cos x[/tex]