f(x)=arcsin(sinx)当x∈[-π/2,π/2]时,arcsin(sinx)=x当x∈(π/2,3π/2]时,π-x∈[-π/2,π/2)sinx=sin(π-x)∴arcsin(sinx)=π-x当x∈[2kπ-π/2,2kπ+π/2],k∈Zx-2kπ∈[-π/2,π/2],k∈Z∴arcsin(sinx)=x-2kπ,...