2025年教学资料:4.7 余弦函数的图像和性质
授课题目 4.7余弦函数的图像和性质 选用教材 高等教育出版社《数学》 (基础模块上册) 授课时长 2课时 授课类型 新授课 教学提示 本课通过类比正弦函数的图像和性质,学习余弦函数的图像和性质,借助代数运算与几何直观,认识余弦函数的图像与性质,学习运用“五点法”可以画出余弦函数在一个周期上的简图.教学目标 学会借鉴正弦函数的图像与性质的研究方法,研究余弦函数的图像与性质,能根据余弦曲线理解余弦函数的周期性、定义域、值域、奇偶性和单调性,逐步提升逻辑推理等核心素养;能用“五点法”作出余弦函数在[0,2π]上的图像;逐步提升直观想象等核心素养;能根据余弦函数的性质解决简单的相关问题,逐步提升逻...
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