• 2022-07-23
    角度x=[604530],计算其正弦函数的运算为
    A: SIND(x)
    B: sin(x)
    C: sin(deg2rad(x))
    D: SIN(x)
  • C

    内容

    • 0

      求函数$f(x)=x^{\sin x}$的导数 A: $x^{\cos x}$ B: $\sin (x) x^{\sin (x) -1}$ C: $x^{\sin x}(\cos x\ln x+\frac{\sin x}{x})$ D: $x^{\sin x}(\sin x\ln x+\frac{\cos x}{x}$

    • 1

      【单选题】设y=sin(cos(x)),求 结果为:(本题10.0分) A. cos(cos(x))*cos(x)+ sin(cos(x))*sin(x)^2 B. - cos(cos(x))*cos(x) - sin(cos(x))*sin(x)^2 C. - cos(cos(x))*cos(x)^2 - sin(cos(x))*sin(x)^2 D. - cos(cos(x))*cos(x) ^2- sin(cos(x))*sin(x)

    • 2

      函数\(y = x\cos x\)的导数为( ). A: \(\cos x - x\sin x\) B: \(\cos x{\rm{ + }}x\sin x\) C: \(\sin x{\rm{ + }}x\cos x\) D: \(\sin x - x\cos x\)

    • 3

      求微分方程[img=634x60]17da653955cf9e7.png[/img]的特解。 ( ) A: sin(2*x)/3 - cos(x) - cos(x)/3 B: sin(2*x)/3 - cos(x) - sin(x)/3 C: cos(2*x)/3 - cos(x) - sin(x)/3 D: sin(2*x)/3 - sin(x) - sin(x)/3

    • 4

      [x^2*sin(1/x^2)]/x的X趋于0的极限,为什么不能用sin(1/x^2)~1/x^2带入.