tanx=m,则{sin(x+3π)+cos(π+x)}/{sin(-x)-cos(π+x)}=?
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/28 10:38:37
x)+I̫y183OB|=+4k01|MR>%l(i{mAJ@r4cuR6(hKI.]h9
OwMy>eŋu
qh5`Q6*t
$@ 굳
tanx=m,则{sin(x+3π)+cos(π+x)}/{sin(-x)-cos(π+x)}=?
tanx=m,则{sin(x+3π)+cos(π+x)}/{sin(-x)-cos(π+x)}=?
tanx=m,则{sin(x+3π)+cos(π+x)}/{sin(-x)-cos(π+x)}=?
原式=[sin(2π+x+π)+cos(π+x)]/[-sinx-cos(π+x)]
=[sin(π+x)+cos(π+x)]/[-sinx-cos(π+x)]
=(-sinx-cosx)/(-sinx+cosx) (应用诱导公式)
=(sinx+cosx)/(sinx-cosx)
=(sinx/cosx+1)/(sinx/cosx-1)
=(tanx+1)/(tanx-1)
=(m+1)/(m-1)
tanx=m,则{sin(x+3π)+cos(π+x)}/{sin(-x)-cos(π+x)}=?
若π<x<3π/2,则sqrt(tanx+sinx)+sqrt(tanx-sinx)=?A.2·sqrt(tanx)·sin(x/2-π/4) B.2·sqrt(tanx)·sin(x/2+π/4)C.-2·sqrt(tanx)·sin(x/2-π/4) D.-2sqrt(tanx)`·sin(x/2+π/4)sqrt根号
若tanx=2,则2sin平方x-3sin(π-x)sin(π/2-x)=
已知函数f(x)=(1+1 anx)sin^2x+m sin(x+π/4)sin(x-π/4)
若sin(π/4+x)=5/13且x∈(π/4,3π/4),则(1-tanx)/(1+tanx)=
若tanx/tanx-1=-1 求sin(π/2+x)cos(3π/2-x)
求证(tanxtan2x/tan2x-tanx)/(tan2x-tanx)+√3(sin^2x-cos^2x)=2sin(2x-π/3)
已知sin(X-π/4)=√2/4,则tanx+(1/tanx)的值
已知2tanx/1+tanx=3/5,求sin(π/4+x)的值 过程
已知tanx=sin(x+π/2),则sinx=
已知tanx=sin(x+π/2),则sinx=
2tanx除以(1+(tanx平方))=3/5 求sin((∏/4)+x)
sin(π/4-x/2)=3/5 x属于(0.π/2)则tanx=
已知sin(x+y)/cos(x-y)=m/n,则tanx/tany=?
已知sin(x+π/4)=3/5,sin(x-π/4)=4/5 ,则tanx=
已知sin(π+x)+sin(3/2π-x)=1/5,求tanx过程
若sin(x+y)=1/2,sin(x-y)=1/3,则tanx/tany等于?
已知tanx=3,则[sin(π+x)-2sin(π/2+x)]/[sin(7π-x)+sin(7π/2-x)]已知tanx=3,则[sin(π+x)-2sin(π/2+x)]/[sin(7π-x)+sin(7π/2-x)]的值是