[cot(θ+4π)·cos(θ+π)·sin^2(θ+3π)]/[tan(π+θ)·cos^3(-π-θ)]
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[cot(θ+4π)·cos(θ+π)·sin^2(θ+3π)]/[tan(π+θ)·cos^3(-π-θ)]
如题,望尽快予以解答
如题,望尽快予以解答
![[cot(θ+4π)·cos(θ+π)·sin^2(θ+3π)]/[tan(π+θ)·cos^3(-π-θ)]](/uploads/image/z/11538775-55-5.jpg?t=%5Bcot%EF%BC%88%CE%B8%2B4%CF%80%EF%BC%89%C2%B7cos%EF%BC%88%CE%B8%2B%CF%80%EF%BC%89%C2%B7sin%5E2%EF%BC%88%CE%B8%2B3%CF%80%EF%BC%89%5D%2F%5Btan%EF%BC%88%CF%80%2B%CE%B8%EF%BC%89%C2%B7cos%5E3%EF%BC%88-%CF%80-%CE%B8%EF%BC%89%5D)
[cot(θ+4π)·cos(θ+π)·sin^2(θ+3π)]/[tan(π+θ)·cos^3(-π-θ)]
=[cotθ(-cosθsin²θ]/(tanθcos³θ)
=-[(cosθ/sinθ)sin²θ]/[(sinθ/cosθ)cos²θ]
=-sinθcosθ/sinθcosθ
=-1
=[cotθ(-cosθsin²θ]/(tanθcos³θ)
=-[(cosθ/sinθ)sin²θ]/[(sinθ/cosθ)cos²θ]
=-sinθcosθ/sinθcosθ
=-1
[cot(θ+4π)·cos(θ+π)·sin^2(θ+3π)]/[tan(π+θ)·cos^3(-π-θ)]
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