Selasa, 31 Agustus 2010

Nilai cosinus sudut istimewa

\cos 0^o = 1\,

\cos 15^o = \frac{\sqrt{6} + \sqrt{2}}{4}\,

\cos 30^o = \frac{\sqrt{3}}{2}\,

\cos 37^o = \frac{4}{5}\,

\cos 45^o = \frac {\sqrt{2}}{2}\,

\cos 53^o = \frac{3}{5}\,

\cos 60^o = \frac {1}{2}\,

\cos 75^o = \frac{\sqrt{6} - \sqrt{2}}{4}\,

\cos 90^o = 0\,

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