Y=SIN(-x)的单调增区间?-π/2+2Kπ≤-X≤π/2+2Kπ.求其单调增区间.这样结果是π/2-2Kπ≥X≥-π/2-2Kπ然后怎么与图不符?

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Y=SIN(-x)的单调增区间?-π/2+2Kπ≤-X≤π/2+2Kπ.求其单调增区间.这样结果是π/2-2Kπ≥X≥-π/2-2Kπ然后怎么与图不符?Y=SIN(-x)的单调增区间?-π/2+2Kπ

Y=SIN(-x)的单调增区间?-π/2+2Kπ≤-X≤π/2+2Kπ.求其单调增区间.这样结果是π/2-2Kπ≥X≥-π/2-2Kπ然后怎么与图不符?
Y=SIN(-x)的单调增区间?
-π/2+2Kπ≤-X≤π/2+2Kπ.求其单调增区间.这样结果是π/2-2Kπ≥X≥-π/2-2Kπ
然后怎么与图不符?

Y=SIN(-x)的单调增区间?-π/2+2Kπ≤-X≤π/2+2Kπ.求其单调增区间.这样结果是π/2-2Kπ≥X≥-π/2-2Kπ然后怎么与图不符?
画图一目了然,π/2+2Kπ≤X≤3π/2+2Kπ
有些题不是化简能解决的.图形结合!

y'=-cos(x);递增区间为cos(x)<0的部分,也即是2Kπ+π/2<2Kπ+3/2π。别忘了画的是Y=SIN(-x)的图像