Aromātai
-\frac{\sqrt{2}}{2}\approx -0.707106781
Tohaina
Kua tāruatia ki te papatopenga
\cos(\pi +\frac{\pi }{4})=\cos(\pi )\cos(\frac{\pi }{4})-\sin(\frac{\pi }{4})\sin(\pi )
Whakamahia \cos(x+y)=\cos(x)\cos(y)-\sin(y)\sin(x) ina x=\pi me te y=\frac{\pi }{4} kia whiwhi i te hua.
-\cos(\frac{\pi }{4})-\sin(\frac{\pi }{4})\sin(\pi )
Tīkina te uara \cos(\pi ) mai i te ripanga uara pākoki.
-\frac{\sqrt{2}}{2}-\sin(\frac{\pi }{4})\sin(\pi )
Tīkina te uara \cos(\frac{\pi }{4}) mai i te ripanga uara pākoki.
-\frac{\sqrt{2}}{2}-\frac{\sqrt{2}}{2}\sin(\pi )
Tīkina te uara \sin(\frac{\pi }{4}) mai i te ripanga uara pākoki.
-\frac{\sqrt{2}}{2}-\frac{\sqrt{2}}{2}\times 0
Tīkina te uara \sin(\pi ) mai i te ripanga uara pākoki.
-\frac{\sqrt{2}}{2}
Mahia ngā tātaitai.
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