已知tan阿尔法=3,sin^2阿尔+sin2阿尔法+2cos^2阿尔法=?
已知tan阿尔法=3,sin^2阿尔+sin2阿尔法+2cos^2阿尔法=?
将a={1,2,3}变换为{sin1,sin2,sin3}? Sin[a]|Map[Sin,a]|Map[a,Sin]|Apply[Sin,a]
将a={1,2,3}变换为{sin1,sin2,sin3}? Sin[a]|Map[Sin,a]|Map[a,Sin]|Apply[Sin,a]
已知sinα+2cosα=0,则sin2α+cos2α=______.
已知sinα+2cosα=0,则sin2α+cos2α=______.
Sin参数=4/5sin参数-cos参数>1则sin2参数=
Sin参数=4/5sin参数-cos参数>1则sin2参数=
求y=sin2/3x周期y=sin(2x=派/3)的周期
求y=sin2/3x周期y=sin(2x=派/3)的周期
对于任意锐角α,下列等式不成立的是( ) A: sin2α+cos2α=1 B: tanα?cosα=sinα C: tanα=sinαcosα D: sin(90°-α)=tanα
对于任意锐角α,下列等式不成立的是( ) A: sin2α+cos2α=1 B: tanα?cosα=sinα C: tanα=sinαcosα D: sin(90°-α)=tanα
已知2sin2α+sin2β=3sinα,则sin2α+sin2β的值域是[0,54]∪{2}[0,54]∪{2}.
已知2sin2α+sin2β=3sinα,则sin2α+sin2β的值域是[0,54]∪{2}[0,54]∪{2}.
已知0<α<,β为f(x)=cos的最小正周期,a=,b=(cosα,2),且a·b=m,求的值.2cos2α+sin2α+βcosα-sinα
已知0<α<,β为f(x)=cos的最小正周期,a=,b=(cosα,2),且a·b=m,求的值.2cos2α+sin2α+βcosα-sinα
下列函数中周期是2的函数是( ) A: y=2cos2πx-1 B: y=sin2πx+cosπx C: y=tan(π2x+π3) D: y=sinπxcosπx
下列函数中周期是2的函数是( ) A: y=2cos2πx-1 B: y=sin2πx+cosπx C: y=tan(π2x+π3) D: y=sinπxcosπx
函数[img=79x27]180355ae2690a03.png[/img]在x=2处的二阶泰勒展开式为 A: exp(sin(2))+cos(2)*exp(sin(2))*(x-2)+exp(sin(2))*(sin(2)/2-cos(2)^2/2)*(x-2)^2 B: exp(sin(2))+cos(2)*exp(sin(2))*(x-2)-exp(sin(2))*(sin(2)/2-cos(2)^2/2)*(x-2)^2 C: exp(sin(2))+cos(2)*exp(sin(2))*(x-2)-exp(sin(2))*(sin(2)/2+cos(2)^2/2)*(x-2)^2 D: exp(sin(2))+cos(2)*exp(sin(2))*(x-2)+exp(sin(2))*(sin(2)/2+cos(2)^2/2)*(x-2)^2
函数[img=79x27]180355ae2690a03.png[/img]在x=2处的二阶泰勒展开式为 A: exp(sin(2))+cos(2)*exp(sin(2))*(x-2)+exp(sin(2))*(sin(2)/2-cos(2)^2/2)*(x-2)^2 B: exp(sin(2))+cos(2)*exp(sin(2))*(x-2)-exp(sin(2))*(sin(2)/2-cos(2)^2/2)*(x-2)^2 C: exp(sin(2))+cos(2)*exp(sin(2))*(x-2)-exp(sin(2))*(sin(2)/2+cos(2)^2/2)*(x-2)^2 D: exp(sin(2))+cos(2)*exp(sin(2))*(x-2)+exp(sin(2))*(sin(2)/2+cos(2)^2/2)*(x-2)^2