设sin(45-x)=5/13,0
设X属于(0,90度),求y=[2sin^2(X)+1]/[sin(2X)]的最小值
设函数f(x)=sin(2x+φ)(0
设函数f(x)=sin(2x+a)(0
设函数f(x,y)=sin(x+y),那么f(0,xy)=( )
设函数fx=sin( φ-2x)(0
设函数y=3sin(2x+φ)(0
设(2cosx-sinx)(sin^2x+2cos^2x)=0,则(2cos^2x+sin^2x)/(1+tanx)等于
设函数f(x)=sin(wx+φ)(w>0,-π/2
设sin(xy)-x^2y=0,求dy/dx,求导什么的都要疯了!
设函数F(X)=SIN(X+π/6)+2SIN^2x/2,X属于[0,π]
设f(0)=0,f'(0)=2,求limf(x)/sin 2x ,x 趋向于0
设a>0为常数,已知函数f(x)=cos²[x-(2π/3)]+sin²[x-(5π/6)]+asi