不等式tanx≦-1的解集是
选项:A.(2kπ-π/2,2kπ-π/4](k∈Z)B.[2kπ-π/4,2kπ+3π/2](k∈Z)C.(kπ-π/2,kπ-π/4](k∈Z)D.[2kπ+π/2,...
选项:A.(2kπ-π/2,2kπ-π/4](k∈Z) B.[2kπ-π/4,2kπ+3π/2](k∈Z)
C.(kπ-π/2,kπ-π/4](k∈Z) D.[2kπ+π/2,2kπ+3π/4](k∈Z) 展开
C.(kπ-π/2,kπ-π/4](k∈Z) D.[2kπ+π/2,2kπ+3π/4](k∈Z) 展开
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