在如图的直角三角形中,我们知道sinα=c分之a,cosα=c分之b,tanα=b分之a,∴sin²α+cos²α=c²分之a²+c²=c²分之c²=1,即一个角的正弦和余弦的平方和为,(1)请你根据上面的探究过
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/30 22:44:42
![在如图的直角三角形中,我们知道sinα=c分之a,cosα=c分之b,tanα=b分之a,∴sin²α+cos²α=c²分之a²+c²=c²分之c²=1,即一个角的正弦和余弦的平方和为,(1)请你根据上面的探究过](/uploads/image/z/3731147-35-7.jpg?t=%E5%9C%A8%E5%A6%82%E5%9B%BE%E7%9A%84%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%E4%B8%AD%2C%E6%88%91%E4%BB%AC%E7%9F%A5%E9%81%93sin%CE%B1%3Dc%E5%88%86%E4%B9%8Ba%2Ccos%CE%B1%3Dc%E5%88%86%E4%B9%8Bb%2Ctan%CE%B1%3Db%E5%88%86%E4%B9%8Ba%2C%E2%88%B4sin%26%23178%3B%CE%B1%2Bcos%26%23178%3B%CE%B1%3Dc%26%23178%3B%E5%88%86%E4%B9%8Ba%26%23178%3B%2Bc%26%23178%3B%3Dc%26%23178%3B%E5%88%86%E4%B9%8Bc%26%23178%3B%3D1%2C%E5%8D%B3%E4%B8%80%E4%B8%AA%E8%A7%92%E7%9A%84%E6%AD%A3%E5%BC%A6%E5%92%8C%E4%BD%99%E5%BC%A6%E7%9A%84%E5%B9%B3%E6%96%B9%E5%92%8C%E4%B8%BA%2C%EF%BC%881%EF%BC%89%E8%AF%B7%E4%BD%A0%E6%A0%B9%E6%8D%AE%E4%B8%8A%E9%9D%A2%E7%9A%84%E6%8E%A2%E7%A9%B6%E8%BF%87)
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