怎么画y=2sin(2x+兀/3)+1,（x属于闭区间---0,兀）的图.再列出表,

matlab画几个二元函数x*y/(x^2+y^2)^0.51/(x+y)x*y/(x+y)1/(x*y)sin(x+y)sin(x*y)sin(x)+sin(y)这么多,回答了再加分怎么设置上下限? 求函数y=sin(x+1/3兀)sin(x+1/2兀)的周期 y=sin∧2x的图像怎么画? y=sin(派/2 + x)的图象怎么画 y=sin^2X+sin2X+3怎么求最值? y=sin(x+π/3)+2定义域怎么求? sinx=1/3,sin(x+y)=1,求sin（2y+x）=? 已知sinx=1/3,sin(x+y)=1,则sin（2y+x)= siny=1/3,sin(x＋y)=1,求sin(2x＋y) (cosx)^2-(cosy)^2=1/3求sin(x+y)*sin(x-y). sin^2x+cos^2y=1/2 求3sin^2x+sin^2y的最值 求导数:Y=sin^2(3x)y=Sin^2(3X) 这道题怎么求导数.. y=sin(x-pai/6)怎么变成y=2sin(X/2-pai/6) 1.y=x*e^(2x) 2.y=(sin(2x))/x 3.y=sin(3x+(π/3))怎么求导数! Sin x-sin y=2/3 cos x-cos y=1/2 求cos(x-y) 3sin^2x+-2sin^2y=2sinx sin^2x+-sin^2y=? matlab怎么定义f(x)>> y=sym('2/3*sin(x)*(sin(x)*cos(x)^2)^(1/2)/cos(x)')y =2/3*sin(x)*(sin(x)*cos(x)^2)^(1/2)/cos(x)这样定义之后可以直接用y（0）吗?或者怎样定义函数可以用到y（0）来取值? y=2sin(1/2x -派/6）图像怎么画