Nilai dari sin 210°-3.cos300° +2.tan225° adalah

Sin210-3×cos300°+2×tan225°
=sin(180°+30°)-3×cos(360°-60°)+2×tan(180°+45°)
=-sin30°-3×cos60°+2×tan45°
=-1/2-3×1/2+2×1
=-1/2-3/2+2
=-4/2+2
=0/2
=0

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