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\frac{1}{2}\left(-1\right)\cot(90)
Tīkina te uara \cos(180) mai i te ripanga uara pākoki.
-\frac{1}{2}\cot(90)
Whakareatia te \frac{1}{2} ki te -1, ka -\frac{1}{2}.
-\frac{1}{2}\times 0
Tīkina te uara \cot(90) mai i te ripanga uara pākoki.
0
Whakareatia te -\frac{1}{2} ki te 0, ka 0.