Evalwa
\frac{\sqrt{2}}{2}\approx 0.707106781
Sehem
Ikkupjat fuq il-klibbord
\cos(\frac{3\pi }{2}+\frac{\pi }{4})=\cos(\frac{3\pi }{2})\cos(\frac{\pi }{4})-\sin(\frac{\pi }{4})\sin(\frac{3\pi }{2})
Uża \cos(x+y)=\cos(x)\cos(y)-\sin(y)\sin(x) fejn x=\frac{3\pi }{2} u y=\frac{\pi }{4} biex tikseb ir-riżultat.
0\cos(\frac{\pi }{4})-\sin(\frac{\pi }{4})\sin(\frac{3\pi }{2})
Ikseb il-valur ta’ \cos(\frac{3\pi }{2}) mit-tabella tal-valuri trigonometriċi.
0\times \frac{\sqrt{2}}{2}-\sin(\frac{\pi }{4})\sin(\frac{3\pi }{2})
Ikseb il-valur ta’ \cos(\frac{\pi }{4}) mit-tabella tal-valuri trigonometriċi.
0\times \frac{\sqrt{2}}{2}-\frac{\sqrt{2}}{2}\sin(\frac{3\pi }{2})
Ikseb il-valur ta’ \sin(\frac{\pi }{4}) mit-tabella tal-valuri trigonometriċi.
0\times \frac{\sqrt{2}}{2}-\frac{\sqrt{2}}{2}\left(-1\right)
Ikseb il-valur ta’ \sin(\frac{3\pi }{2}) mit-tabella tal-valuri trigonometriċi.
\frac{\sqrt{2}}{2}
Agħmel il-kalkoli.
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