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