Aromātai
-\frac{\sqrt{3}}{2}\approx -0.866025404
Pātaitai
Trigonometry
\cos ( 150 )
Tohaina
Kua tāruatia ki te papatopenga
\cos(90+60)=\cos(90)\cos(60)-\sin(60)\sin(90)
Whakamahia \cos(x+y)=\cos(x)\cos(y)-\sin(y)\sin(x) ina x=90 me te y=60 kia whiwhi i te hua.
0\cos(60)-\sin(60)\sin(90)
Tīkina te uara \cos(90) mai i te ripanga uara pākoki.
0\times \frac{1}{2}-\sin(60)\sin(90)
Tīkina te uara \cos(60) mai i te ripanga uara pākoki.
0\times \frac{1}{2}-\frac{\sqrt{3}}{2}\sin(90)
Tīkina te uara \sin(60) mai i te ripanga uara pākoki.
0\times \frac{1}{2}-\frac{\sqrt{3}}{2}\times 1
Tīkina te uara \sin(90) mai i te ripanga uara pākoki.
-\frac{\sqrt{3}}{2}
Mahia ngā tātaitai.
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