设cosx+cosy=1,则sinx+siny的取值范围为
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设cosx+cosy=1,则sinx+siny的取值范围为设cosx+cosy=1,则sinx+siny的取值范围为设cosx+cosy=1,则sinx+siny的取值范围为1[-2,2]sinx+s
设cosx+cosy=1,则sinx+siny的取值范围为
设cosx+cosy=1,则sinx+siny的取值范围为
设cosx+cosy=1,则sinx+siny的取值范围为
1
[-2,2]
sinx+siny+cosx+cosy=√2sin(x+π/4)+√2sin(y+π/4)=√2(sin(x+π/4)+sin(y+π/4)),所以,有-2√2<=sinx+siny+cosx+cosy<=2√2,-2√2-1<=sinx+siny<=2√2-1
设sinx-cosy=1,则cosx-siny的取值范围
设cosx+cosy=1,则sinx+siny的取值范围为
cosx+cosy=1,则sinx+siny的范围
已知sinx+siny=cosx+cosy=1/2007,则sinx+cosx=多少
已知1+cosx-siny+sinx*siny=0,1-cosx-cosy+sinx*cosy=0.求Sinx.
已知1+cosx-siny+sinx*siny=0,1-cosx-cosy+sinx*cosy=0,求sinx的值
若α≠0,且sinx+cosy=α,cosx+cosy=α,则sinx+cosx= 是sinx+siny=a,cosx+cosy=a
已知cosx-cosy=1/3,求cosy-2(sinx)^2的最大值.
cosx+cosy=1/2,sinx-siny=1/3,则cos(x+y)=?
已知cosx+cosy=1/2,sinx-siny=1/3,则cos(x+y)=
sinx+cosy=1/3 cosx+siny=1/6 则sin(x+y)=?RT
设cosx+cosy=1/2,sinx+siny=1/4,求cos(x-y)的值
设cosX+cosY=1/2,sinX+sinY =1/4,求cos(X-Y)的值
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sinx+cosy=1/3 cosx+siny=1/6 则 sin(x+y)?
若cosx*cosy+sinx*siny=1/3 ,则cos(2x-2y)=?
sinx-siny=-√3/3 cosx-cosy=-1/3 则cos(x-y)
若sinx+siny=1,则cosx+cosy的取值范围是