已知f(x)=[sin(3π-x)cos(x-π)tan(x-π)cot(nπ/2 +x)]/cos(nπ-x),(n∈Z) (1) 求f(52π/3) (2) 已知f(x)=[sin(3π-x)cos(x-π)tan(x-π)cot(nπ/2 +x)]/cos(nπ-x),(n∈Z)(1) 求f(52π/3)(2) 若cos(α-3π/2)=4/5,求f(α)
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![已知f(x)=[sin(3π-x)cos(x-π)tan(x-π)cot(nπ/2 +x)]/cos(nπ-x),(n∈Z) (1) 求f(52π/3) (2) 已知f(x)=[sin(3π-x)cos(x-π)tan(x-π)cot(nπ/2 +x)]/cos(nπ-x),(n∈Z)(1) 求f(52π/3)(2) 若cos(α-3π/2)=4/5,求f(α)](/uploads/image/z/5295641-41-1.jpg?t=%E5%B7%B2%E7%9F%A5f%28x%29%3D%5Bsin%283%CF%80-x%29cos%28x-%CF%80%29tan%28x-%CF%80%29cot%28n%CF%80%2F2+%2Bx%29%5D%2Fcos%28n%CF%80-x%29%2C%EF%BC%88n%E2%88%88Z%EF%BC%89+%EF%BC%881%EF%BC%89+%E6%B1%82f%2852%CF%80%2F3%29+%EF%BC%882%EF%BC%89+%E5%B7%B2%E7%9F%A5f%28x%29%3D%5Bsin%283%CF%80-x%29cos%28x-%CF%80%29tan%28x-%CF%80%29cot%28n%CF%80%2F2++%2Bx%29%5D%2Fcos%28n%CF%80-x%29%EF%BC%8C%EF%BC%88n%E2%88%88Z%EF%BC%89%EF%BC%881%EF%BC%89+%E6%B1%82f%2852%CF%80%2F3%29%EF%BC%882%EF%BC%89+%E8%8B%A5cos%EF%BC%88%CE%B1-3%CF%80%2F2%EF%BC%89%3D4%2F5%EF%BC%8C%E6%B1%82f%28%CE%B1%29)
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