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Verified answer
Cos330° = Cos(360-30)= Cos30°= ½√3Tan225°= Tan(180+45)= - Tan45°=-1
Sin210° = Sin(180+30)= Sin30°= ½
Cot330° = Cos330/Sin330= ½√3 / -½= -√3
maka
(½√3)(-1)-(½)(-√3)
-½√3 + ½√3
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