有难度啊.角α的顶点在原点,始边与x轴的正半轴重合,终边在函数y=2x(x≤0)的图像上.(1)求cosα和sin(π+α)的值.(2)能否求出角2kπ+α(k∈z),-α,2π-α,π±α,π/2±α的sin值,cos值?若能,求出
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/31 23:41:59
![有难度啊.角α的顶点在原点,始边与x轴的正半轴重合,终边在函数y=2x(x≤0)的图像上.(1)求cosα和sin(π+α)的值.(2)能否求出角2kπ+α(k∈z),-α,2π-α,π±α,π/2±α的sin值,cos值?若能,求出](/uploads/image/z/14411148-60-8.jpg?t=%E6%9C%89%E9%9A%BE%E5%BA%A6%E5%95%8A.%E8%A7%92%CE%B1%E7%9A%84%E9%A1%B6%E7%82%B9%E5%9C%A8%E5%8E%9F%E7%82%B9%2C%E5%A7%8B%E8%BE%B9%E4%B8%8Ex%E8%BD%B4%E7%9A%84%E6%AD%A3%E5%8D%8A%E8%BD%B4%E9%87%8D%E5%90%88%2C%E7%BB%88%E8%BE%B9%E5%9C%A8%E5%87%BD%E6%95%B0y%3D2x%EF%BC%88x%E2%89%A40%EF%BC%89%E7%9A%84%E5%9B%BE%E5%83%8F%E4%B8%8A.%EF%BC%881%EF%BC%89%E6%B1%82cos%CE%B1%E5%92%8Csin%EF%BC%88%CF%80%2B%CE%B1%EF%BC%89%E7%9A%84%E5%80%BC.%EF%BC%882%EF%BC%89%E8%83%BD%E5%90%A6%E6%B1%82%E5%87%BA%E8%A7%922k%CF%80%2B%CE%B1%EF%BC%88k%E2%88%88z%EF%BC%89%2C-%CE%B1%2C2%CF%80-%CE%B1%2C%CF%80%C2%B1%CE%B1%2C%CF%80%2F2%C2%B1%CE%B1%E7%9A%84sin%E5%80%BC%2Ccos%E5%80%BC%3F%E8%8B%A5%E8%83%BD%2C%E6%B1%82%E5%87%BA)
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