1.y=sin^2x+2sinxcosx+3cos^2x=(sin^2x+cos^2x)+2cos^2x+2sinx cosx=2+根号2*sin(2x+π/4)
最小正周期π,最大值2+根号2,x=(π/8)+kπ(k是整数)
2.p1=(1-1/3)*(1/4)+(1/3)*(1-1/4)=自己算啦
p2=p1+(1/3)*(1/4)=自己算吧
ok!
1.y=sin^2x+2sinxcosx+3cos^2x=(sin^2x+cos^2x)+2cos^2x+2sinx cosx=2+根号2*sin(2x+π/4)
最小正周期π,最大值2+根号2,x=(π/8)+kπ(k是整数)
2.p1=(1-1/3)*(1/4)+(1/3)*(1-1/4)=自己算啦
p2=p1+(1/3)*(1/4)=自己算吧
ok!