Aromātai
\frac{1}{2}=0.5
Tohaina
Kua tāruatia ki te papatopenga
\sin(180+30)=\sin(180)\cos(30)+\sin(30)\cos(180)
Whakamahia \sin(x+y)=\sin(x)\cos(y)+\sin(y)\cos(x) ina x=180 me te y=30 kia whiwhi i te hua.
0\cos(30)+\sin(30)\cos(180)
Tīkina te uara \sin(180) mai i te ripanga uara pākoki.
0\times \frac{\sqrt{3}}{2}+\sin(30)\cos(180)
Tīkina te uara \cos(30) mai i te ripanga uara pākoki.
0\times \frac{\sqrt{3}}{2}+\frac{1}{2}\cos(180)
Tīkina te uara \sin(30) mai i te ripanga uara pākoki.
0\times \frac{\sqrt{3}}{2}+\frac{1}{2}\left(-1\right)
Tīkina te uara \cos(180) mai i te ripanga uara pākoki.
-\frac{1}{2}
Mahia ngā tātaitai.
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