)设集合M={y|y=|cos^2x-sin^2x|,x∈R},N={x||x-1/i|<根号2,i为虚数单位,x∈R},则M∩N为A.(0,1) B.(0,1] C.[0,1) D.[0,1]

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)设集合M={y|y=|cos^2x-sin^2x|,x∈R},N={x||x-1/i|<根号2,i为虚数单位,x∈R},则M∩N为A.(0,1)B.(0,1]C.[0,1)D.[0,1])设集合M=

)设集合M={y|y=|cos^2x-sin^2x|,x∈R},N={x||x-1/i|<根号2,i为虚数单位,x∈R},则M∩N为A.(0,1) B.(0,1] C.[0,1) D.[0,1]
)设集合M={y|y=|cos^2x-sin^2x|,x∈R},N={x||x-1/i|<根号2,i为虚数单位,x∈R},则M∩N为
A.(0,1) B.(0,1] C.[0,1) D.[0,1]

)设集合M={y|y=|cos^2x-sin^2x|,x∈R},N={x||x-1/i|<根号2,i为虚数单位,x∈R},则M∩N为A.(0,1) B.(0,1] C.[0,1) D.[0,1]
M={y|y=|cos^2x-sin^2x|
=|cos2x|
M=[0,1]
N={x||x-1/i|<根号2
x-(1/i)=x+i 模=√(x²+1)