y=xcos(1/x)

y=xcos(1/x) 求证 cos*xcos*y + sin*xsin*y + sin*xcos*y + xin*ycos*x = 1cos*xcos*y + sin*xsin*y + sin*xcos*y + sin*ycos*x = 1注意：[*] 的意思是 [ ^2 ]写下左右过程.. y=1-4sin²xcos²x的导数y'= (2xsin(y/x)-ycos(y/x))dx+(xcos(y/x)+1)dy=0 求y ∫xcos(1+x^2)dx= 求方程[xcos(x+y)+sin(x+y)]dx+xcos(x+y)dy=0的通解, 求证:sin(x-y)sin(x+y)/sin²xcos²y=1-cot²xtan²y y=∫xcos(t²+1）dt下限是0,上限是x½, 函数y=cosπxcosπ(x-1)的最小正周期 函数y=-xcos x的函数图像怎么判断 求全微分:z=xcos(x-y)$(acontent) ysin^3α+xcos^3α=a,ysinα-xcosα=0,求证1/x²+1/y²=1/a²ysin^3α+xcos^3α=a,ysinα-xcosα=0,求证1/x^2+1/y^2=1/a^2 求解微分方程：[x-ycos(y/x)]dx+xcos(y/x)dy=0. 求解微分方程 (x-ycos(y/x))dx+xcos(y/x)dx=0 设A={(x,y)|xcosα+ysinα≥1},B={(x,y)|(x,y)不属于A},则集合B表示图形的面积为?. 求值域 y=sin x-cos x+sin xcos x 已知Y=sin^4*3xcos^3* 4x求Y的导数 f(x) = xcos(3x)求导