y=cos(3/π+2x)sin(3/π-2x)的单调增区间
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y=cos(3/π+2x)sin(3/π-2x)的单调增区间
y=cos(3/π+2x)sin(3/π-2x)的单调增区间
y=cos(3/π+2x)sin(3/π-2x)的单调增区间
应用积化和差公式,即可得答案
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