如果sin(x+y)/sin(x-y)=m/n,则tany/tanx的值为?有助于回答者给出准确的答案
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如果sin(x+y)/sin(x-y)=m/n,则tany/tanx的值为?有助于回答者给出准确的答案
如果sin(x+y)/sin(x-y)=m/n,则tany/tanx的值为?
有助于回答者给出准确的答案
如果sin(x+y)/sin(x-y)=m/n,则tany/tanx的值为?有助于回答者给出准确的答案
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n(1+tany/tanx)=m(1-tany/tanx)
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