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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

\cos(-60)
Tangohia te 150 i te 90, ka -60.
\cos(60)
Whakamahia te āhuatanga \cos(-x)=\cos(x).
\frac{1}{2}
Tīkina te uara \cos(60) mai i te ripanga uara pākoki.