高一第1课时1_1_2弧度制练习题.ppt

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高一第1课时1_1_2弧度制练习题.ppt

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高一第1课时1_1_2弧度制练习题

【课标要求】 1．了解角的另外一种度量方法——弧度制． 2．能进行弧度与角度的互化． 3．掌握弧度制中扇形的弧长公式和面积公式．【核心扫描】 1．对弧度制概念的理解．(难点) 2．弧度制与角度制的互化．(重点、易错点) 1.1.2　弧度制 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 半径长负数正数 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2．角度制与弧度制的换算 (1) 2π 360° π 180° Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. (2)一些特殊角的度数与弧度数的对应关系 90° 180° Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 互动探究探究点1 角α＝2这种表达方式正确吗？提示　正确．用弧度制表示角时，“弧度”二字或“rad”通常略去不写，角α＝2就表示α是2 rad的角．探究点2 弧度制与角度制有何区别与联系？提示　(1)区别：①弧度制是以“弧度”为单位来度量角的单位制，角度制是以“度”为单位来度量角的单位制． Evaluation o