函数y=cosa/(1-sina)的单调增区间是( )A.(2kπ-1.5π,2kπ+0.5π)B..( 2kπ-0.5π,2kπ+0.5π)C.(2kπ-1.5π,2kπ-0.5π)D.( kπ-0.5π,2kπ+0.5π)

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函数y=cosa/(1-sina)的单调增区间是( )A.(2kπ-1.5π,2kπ+0.5π)B..( 2kπ-0.5π,2kπ+0.5π)C.(2kπ-1.5π,2kπ-0.5π)D.( kπ-0.5π,2kπ+0.5π)
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函数y=cosa/(1-sina)的单调增区间是( )A.(2kπ-1.5π,2kπ+0.5π)B..( 2kπ-0.5π,2kπ+0.5π)C.(2kπ-1.5π,2kπ-0.5π)D.( kπ-0.5π,2kπ+0.5π)
函数y=cosa/(1-sina)的单调增区间是( )
A.(2kπ-1.5π,2kπ+0.5π)
B..( 2kπ-0.5π,2kπ+0.5π)
C.(2kπ-1.5π,2kπ-0.5π)
D.( kπ-0.5π,2kπ+0.5π)

函数y=cosa/(1-sina)的单调增区间是( )A.(2kπ-1.5π,2kπ+0.5π)B..( 2kπ-0.5π,2kπ+0.5π)C.(2kπ-1.5π,2kπ-0.5π)D.( kπ-0.5π,2kπ+0.5π)
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