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函数f(x)=sinx+g(x)在[,]上单调递减,则g(x)的表达式为
A.-cosx B.cosx C.1 D.-tanx
函数f(x)=sinx+g(x)在[,]上单调递减,则g(x)的表达式为
A.-cosx
B.cosx
C.1
D.-tanx