2.:简图例1、画出下列函数的;2,0,sin1)1(xxy.2,0,cos)2(xxy223x02sinx00101+sinx121012-25O32 22g x =sin x f x =1+sin x 列表描点,连线,画出简图解(1)2-2510g x =cos x f x =-cos x O232 2223x02cosx10-101-cosx-1010-1列表描点,连线,画出简图解(2)