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	<title>radian &#8211; O₂ Education</title>
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	<description>TRI THỨC CŨNG CẦN NHƯ KHÍ THỞ</description>
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		<title>Radian là gì?</title>
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		<pubDate>Sat, 30 Oct 2021 12:01:40 +0000</pubDate>
				<category><![CDATA[Lượng giác]]></category>
		<category><![CDATA[Toán 10]]></category>
		<category><![CDATA[radian]]></category>
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					<description><![CDATA[Radian là gì? Bình thường trong đời sống hằng ngày, khi nói về góc, chúng ta thường dùng đơn vị độ. Ví dụ góc vuông có số đo là 90 độ, góc tam giác đều là 60 độ, góc bẹt là 180 độ. Tuy nhiên, trong toán học, tất cả các hàm số, ví dụ [&#8230;]]]></description>
		
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