y =1-cos^2x+sin2x+3cos^2x=sin2x+2cos2x-1+2=sin2x+cos2x+2 求導… y'=2cos2X-2sin2X 令y'=0,得x=(π/8)+kπ/2 把x=π/8帶入 y=2+根號2 ...
確定! 回上一頁