y=log1/2(sinx-cosx)..求...

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y=log1/2(sinx-cosx)..求...y=log1/2(sinx-cosx)..求...y=log1/2(sinx-cosx)..求...(1)f(x)=log1/2(sinx-cosx)

y=log1/2(sinx-cosx)..求...
y=log1/2(sinx-cosx)..求...

y=log1/2(sinx-cosx)..求...
(1)f(x)=log1/2(sinx-cosx)
=log(1/2)[√2*sin(x-π/4)]
因为 sin(x-π/4)>0,(真数大于0)
所以2kπ