A. sqofsina(x) float x ; { return(sin(x)*sin(x)) ; } B. double sqofsinb(x) float x ; { return(sin((double)x)*sin((double)x)) ; } C. double sqofsinc(x) { return(((sin(x)*sin(x)) ; } D. sqofsind(x) float x ; { return(double(sin(x)*sin(x))) ; }
举一反三
- 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: $x^{\sin x}(\sin x\ln x+\frac{\cos x}{x}$
- 【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)
- 角度x=〔304560〕,计算其正弦函数的运算为() A: SIN(deg2rad(x)) B: SIN(x) C: sin(x) D: sin(deg2rad(x))
- 求函数$f(x)=e^x\cos x$的导数 A: $-e^x\sin x$ B: $e^x\sin x$ C: $e^x(\cos x+\sin x)$ D: $e^x(\cos x-\sin x)$
- 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: \(\sin x - x\cos x\)
内容
- 0
函数\(y = { { \sin x} \over x}\)的导数为( ). A: \( { { x\cos x - \sin x} \over { { x^2}}}\) B: \( { { x\cos x + \sin x} \over { { x^2}}}\) C: \( { { x\sin x - \cos x} \over { { x^2}}}\) D: \( { { x\sin x + \cos x} \over { { x^2}}}\)
- 1
【单选题】在 MATLAB 命令窗口中 , 键入命令 syms x ; int(x*sin(x)) 。结果是 A. ans= sin(x)-x*cos(x) B. ans= cos(x)+x*sin(x) C. ans= sin(x)-cos(x) D. ans= -1/2*cos(x)*sin(x)+1/2*x
- 2
下列各组选项的两个语句运行结果不同的是? Dt[Sin[x],{x,4}] ,D[Sin[x],{x,4}]|D[Sin[x]Sin[y],x], Dt[Sin[x]Sin[y],x,Constants→y]|Dt[Sin[x]Sin[y],x] ,D[Sin[x]Sin[y],x,NonConstants→y]|Dt[x^2y^3,x,y],D[x^2y^3,x,y]
- 3
角度x =[30 45 60],计算其正弦函数的运算为( ). A: sin(deg2rad(x)) B: SIN(x) C: SIN(deg2rad(x)) D: sin(x)
- 4
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