xy+cosy-sinx=1,求dy.
xy+cosy-sinx=1,求dy.
如果xy=sinx * cosy,求dy/dx
求方程(xy+y+sinx)dx+(x+cosy)dy=0的通解
(sinx)^cosy=(cosx)^siny,求dy?(^代表幂)
(cosy)^x=(sinx)^y求dy/dx
sinx+ siny=xy求dy/dx
已知sinx+siny=1/3,求sinx-cosy*cosy的最大值和最小值.
ysiny(1-cosy)dy的不定积分怎么求?
e^x=cosy-xy^2,求dy/dx|x=0
(1+y^2)dx+(xy-根号下(1+y^2 ) cosy)dy=0
微分方程(1+y^2)dx+(xy-genhao1+y^2 cosy)dy=0
已知sinx+cosy=3/4,cosx+cosy+1/2,求tanx*tany