Issolvi sin7pi/6

$$\sin \frac { 7 \pi } { 6 }$$

Evalwa

$$-\frac{1}{2}=-0.5$$

Passi tas-Soluzzjonijiet

Uża \sin(x+y)=\sin(x)\cos(y)+\sin(y)\cos(x) fejn x=\pi u y=\frac{\pi }{6} biex tikseb ir-riżultat.

$$\sin(\pi +\frac{\pi }{6})=\sin(\pi )\cos(\frac{\pi }{6})+\sin(\frac{\pi }{6})\cos(\pi )$$

Ikseb il-valur ta’ \sin(\pi ) mit-tabella tal-valuri trigonometriċi.

$$0\cos(\frac{\pi }{6})+\sin(\frac{\pi }{6})\cos(\pi )$$

Ikseb il-valur ta’ \cos(\frac{\pi }{6}) mit-tabella tal-valuri trigonometriċi.

$$0\times \frac{\sqrt{3}}{2}+\sin(\frac{\pi }{6})\cos(\pi )$$

Ikseb il-valur ta’ \sin(\frac{\pi }{6}) mit-tabella tal-valuri trigonometriċi.

$$0\times \frac{\sqrt{3}}{2}+\frac{1}{2}\cos(\pi )$$

Ikseb il-valur ta’ \cos(\pi ) mit-tabella tal-valuri trigonometriċi.

$$0\times \frac{\sqrt{3}}{2}+\frac{1}{2}\left(-1\right)$$

Agħmel il-kalkoli.

$$-\frac{1}{2}$$

Fattur

$$-\frac{1}{2} = -0.5$$