作业帮若(cos2x)/[sin(x-π/4)]=-√2/2,则cosx+sinx的值为______
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![若(cos2x)/[sin(x-π/4)]=-√2/2,则cosx+sinx的值为______](/uploads/image/z/1043839-55-9.jpg?t=%E8%8B%A5%28cos2x%29%2F%5Bsin%28x-%CF%80%2F4%29%5D%3D-%E2%88%9A2%2F2%2C%E5%88%99cosx%2Bsinx%E7%9A%84%E5%80%BC%E4%B8%BA______)
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若(cos2x)/[sin(x-π/4)]=-√2/2,则cosx+sinx的值为______
若(cos2x)/[sin(x-π/4)]=-√2/2,则cosx+sinx的值为______
若(cos2x)/[sin(x-π/4)]=-√2/2,则cosx+sinx的值为______
(cosx^2-sinx^2)/(sinx-cosx)=1,cosx+sinx=-1