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函数y=cos²2x-sin²2x怎么化简
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1.y=x*e^(2x) 2.y=(sin(2x))/x 3.y=sin(3x+(π/3))怎么求导数!
若直线l1:x*sinα+y-2=0与直线l2:(√3/4)x+y*conα+1=0(α∈[0,∏/2])平行,则α=
y =(cos^2) x - sin (3^x),求y'
化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)
证明sinx+siny+sinz-sin(x+y+z)=4sin((x+y)/2)sin((x+y)/2)sin((x+
请问怎么证明sinX+sin(X+Y)+sin(X+2Y)/cosX+cos(X+Y)+cos(X+2Y)=tan(X+
参数方程x=sin^2α与y=-cosαsinα化为普通方程,怎么化简?