求下列函数的单调区间:y=sin(x+π/3); y=cos2x

求下列函数的单调区间:y=sin(x+π/3); y=cos2x
求下列函数的单调区间:y=sin(x+π/3); y=cos2x

求下列函数的单调区间:y=sin(x+π/3); y=cos2x
(1)
y=sin(x+π/3)
单调递增区间
-π/2+2kπ

先求其导数值y'=(x+派比3)‘Xcos（x+派比3）在X轴上方即为其单调递增区间，反之为递减区间；y'=-2cos2x同上