已知cos(π-α)=- ,sin(π+β)= ;α,β ( π,2π) 则sin(α+β)和tan(α+β)的已知cos(π-α)=- 3/5,sin(π+β)=12/13;α,β属于(π,2π) 则sin(α+β)和tan(α+β)的值为
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![已知cos(π-α)=- ,sin(π+β)= ;α,β ( π,2π) 则sin(α+β)和tan(α+β)的已知cos(π-α)=- 3/5,sin(π+β)=12/13;α,β属于(π,2π) 则sin(α+β)和tan(α+β)的值为](/uploads/image/z/378348-60-8.jpg?t=%E5%B7%B2%E7%9F%A5cos%EF%BC%88%CF%80-%CE%B1%EF%BC%89%3D-+%2Csin%EF%BC%88%CF%80%2B%CE%B2%EF%BC%89%3D+%EF%BC%9B%CE%B1%2C%CE%B2+%EF%BC%88+%CF%80%2C2%CF%80%EF%BC%89+%E5%88%99sin%EF%BC%88%CE%B1%2B%CE%B2%EF%BC%89%E5%92%8Ctan%EF%BC%88%CE%B1%2B%CE%B2%EF%BC%89%E7%9A%84%E5%B7%B2%E7%9F%A5cos%EF%BC%88%CF%80-%CE%B1%EF%BC%89%3D-+3%2F5%2Csin%EF%BC%88%CF%80%2B%CE%B2%EF%BC%89%3D12%2F13%EF%BC%9B%CE%B1%2C%CE%B2%E5%B1%9E%E4%BA%8E%EF%BC%88%CF%80%2C2%CF%80%EF%BC%89+%E5%88%99sin%EF%BC%88%CE%B1%2B%CE%B2%EF%BC%89%E5%92%8Ctan%EF%BC%88%CE%B1%2B%CE%B2%EF%BC%89%E7%9A%84%E5%80%BC%E4%B8%BA)
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