求(d/dx) sin x2 =

求(d/dx) sin x2 = 求(d/dx) sin x2 = 求定积分：d/dx*[∫ (1到2)sin(x^2)dx]= x=a(θ-sinθ) y=a(1-cosθ)x=a(θ-sinθ),y=a(1-cosθ).求d^2y/dx^2.dy/dx=cotθ/2,d^2y/dx^2=d/dx*dy/dx=d（dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθ= 我想问哈d^2y/dx^2那后面d（dy/dx)/dθ*dθ/dx=d(dy/dx)/dθ*1/dx/dθz这两步是如何化解的. 设函数y=sin(2x²+1),求dy/dx,d²y/dx² 设y=sin(x y),求d²y/dx² Z=X2+Y2 X2+2Y2+3Z2=4 求dy/dx,dz/dx 定积分 从b 到 a 求 d∫ sin(x^2)dx/dx dx/dt=6t+2,dy/dt=（3t+1）sin（t^2）,求d^2y/dx^2d^2y/dx^2不是直接对dy/dx求导吗 求 x2√(4-x2) dx 不定积分 ∫sin^3(x) dx 求不定积分最主要的是,dx--->d(cosx)[或者其他]后,前面的怎么相应变化呢,∫sin^2(x)sin(x)dx = -∫sin^2(x)dcosx ,,∫sin^2(x)照抄,,,那么sin(x)怎么就成了个 -号呢? y=sin[f（x^2）]其中f具有二阶导数,求d^2y/dx^2 设y=sin^2[f(x^2)],其中f具有二阶导数,求d^2y/dx^2 设y=sin²[f(x²)],其中f具有二阶导数,求d²y/dx². d{cos(x-y)=sin(x-y)(dx-dy)这里dx-dy是什么意思呢? 定积分d/dx*[∫ （1到2）sin x^2dx]= d/dx[∫(下限2 上限8)sin(ln x^2)dx]= xy(dy/dx)=x2+y2 求这个微分方程