cos510° — sin1200° — tg1050°= -√3/2-√3/2-(-√3/3)=-√3/2-√3/2+√3/3=-2√3/3
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cos510° — sin1200° — tg1050°= -√3/2-√3/2-(-√3/3)=-√3/2-√3/2+√3/3=-2√3/3