sin(3X)=3sin(X)-4sin^3(X)
sin(3X)=3sin(X)-4sin^3(X)
1802fa0b3e3fac1.png,求y的一阶导数 A: 3sin^2(x/3) B: sin^2(x/3) C: 3sin^2(x/3)cos(x/3) D: sin^(x/3)cos(x/3)
1802fa0b3e3fac1.png,求y的一阶导数 A: 3sin^2(x/3) B: sin^2(x/3) C: 3sin^2(x/3)cos(x/3) D: sin^(x/3)cos(x/3)
函数y=cos(3x+2)的导数是( ) A: -3sin(3x+2) B: 3sin(3x+2) C: sin(3x+2) D: -sin(3x+2)
函数y=cos(3x+2)的导数是( ) A: -3sin(3x+2) B: 3sin(3x+2) C: sin(3x+2) D: -sin(3x+2)
对于数学表达式2x+(a+b)÷3sinx,对应的C表达式是() A: 2x+(a+b)/3sin(x) B: 2x+(a+b)/(3sin(x)) C: 2*x+(a+b)/3/sin(x) D: 2*x+(a+b/3/sin(x))
对于数学表达式2x+(a+b)÷3sinx,对应的C表达式是() A: 2x+(a+b)/3sin(x) B: 2x+(a+b)/(3sin(x)) C: 2*x+(a+b)/3/sin(x) D: 2*x+(a+b/3/sin(x))
对于数学表达式,正确的C语言表达式是() A: 2sqrt(x)+(a+b)/3sin(x) B: 2sqrt(x)+(a+b)/(3sin(x)) C: 2*sqrt(x)+(a+b)/3/sin(x) D: 2*sqrt(x)+(a+b/3*sin(x))
对于数学表达式,正确的C语言表达式是() A: 2sqrt(x)+(a+b)/3sin(x) B: 2sqrt(x)+(a+b)/(3sin(x)) C: 2*sqrt(x)+(a+b)/3/sin(x) D: 2*sqrt(x)+(a+b/3*sin(x))
对称正序三相电压源星形联接,若相电压UA=100 sin(ωt- 60°)V,则线电压Uab=____ V。 A: 100√3sin(ωt-60°) B: 100√3sin(ωt-30°) C: 100sin(ωt+150°) D: 100sin(ωt-150°)
对称正序三相电压源星形联接,若相电压UA=100 sin(ωt- 60°)V,则线电压Uab=____ V。 A: 100√3sin(ωt-60°) B: 100√3sin(ωt-30°) C: 100sin(ωt+150°) D: 100sin(ωt-150°)
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
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
已知sin(α+β)=2/1,sin(α-β)=3/1求证:sinαcosβ=5cosαsinβ
已知sin(α+β)=2/1,sin(α-β)=3/1求证:sinαcosβ=5cosαsinβ
级数sin(π/6)+sin(2π/6)+sin(3π/6)+…收敛
级数sin(π/6)+sin(2π/6)+sin(3π/6)+…收敛
生成{Sin[1],Sin[2],Sin[3]} A: a={1,2,3};Sin[a] B: Table[Sin[k],{k,3}] C: Table[Sin(k),{k,3}] D: Table[{Sin[k]},{k,3}]
生成{Sin[1],Sin[2],Sin[3]} A: a={1,2,3};Sin[a] B: Table[Sin[k],{k,3}] C: Table[Sin(k),{k,3}] D: Table[{Sin[k]},{k,3}]