三角函数描点作图演示（课堂投影优化版）
2020-11-17 13:59
本范例专为课堂投影优化，调整了颜色与尺寸以提高可视性。主要演示三角函数（正弦、余弦、正切、余切、正割等）的描点作图过程。通过动态序列和按钮控制，直观展示三角函数图像的形成与特征，适合中学数学课堂教学使用。
GeoGebra 画板及绘图内容加载中，请稍等……
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<output a0="list_{t}" randomResult="{x = -125.66370614359172, x = -122.52211349000193, x = -119.38052083641213, x = -116.23892818282235, x = -113.09733552923255, x = -109.95574287564276, x = -106.81415022205297, x = -103.67255756846318, x = -100.53096491487338, x = -97.38937226128358, x = -94.24777960769379, x = -91.106186954104, x = -87.96459430051421, x = -84.82300164692441, x = -81.68140899333463, x = -78.53981633974483, x = -75.39822368615503, x = -72.25663103256524, x = -69.11503837897544, x = -65.97344572538566, x = -62.83185307179586, x = -59.690260418206066, x = -56.548667764616276, x = -53.40707511102649, x = -50.26548245743669, x = -47.12388980384689, x = -43.982297150257104, x = -40.840704496667314, x = -37.69911184307752, x = -34.55751918948772, x = -31.41592653589793, x = -28.274333882308138, x = -25.132741228718345, x = -21.991148575128552, x = -18.84955592153876, x = -15.707963267948966, x = -12.566370614359172, x = -9.42477796076938, x = -6.283185307179586, x = -3.141592653589793, x = 0, x = 3.141592653589793, x = 6.283185307179586, x = 9.42477796076938, x = 12.566370614359172, x = 15.707963267948966, x = 18.84955592153876, x = 21.991148575128552, x = 25.132741228718345, x = 28.274333882308138, x = 31.41592653589793, x = 34.55751918948772, x = 37.69911184307752, x = 40.840704496667314, x = 43.982297150257104, x = 47.12388980384689, x = 50.26548245743669, x = 53.40707511102649, x = 56.548667764616276, x = 59.690260418206066, x = 62.83185307179586, x = 65.97344572538566, x = 69.11503837897544, x = 72.25663103256524, x = 75.39822368615503, x = 78.53981633974483, x = 81.68140899333463, x = 84.82300164692441, x = 87.96459430051421, x = 91.106186954104, x = 94.24777960769379, x = 97.38937226128358, x = 100.53096491487338, x = 103.67255756846318, x = 106.81415022205297, x = 109.95574287564276, x = 113.09733552923255, x = 116.23892818282235, x = 119.38052083641213, x = 122.52211349000193, x = 125.66370614359172}"/>
</command>
<element type="list" label="list_{t}">
<show object="true" label="true" ev="4"/>
<condition showObject="(ta ∨ ct) ∧ cir"/>
<objColor r="255" g="153" b="0" alpha="0"/>
<layer val="1"/>
<labelMode val="0"/>
<lineStyle thickness="10" type="10" typeHidden="1" opacity="204"/>
<pointSize val="5"/>
<pointStyle val="0"/>
<angleStyle val="0"/>
</element>
</construction>
</geogebra>