tanA属于[负根号3/3,根号3/3]求A的范围,急
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tanA属于[负根号3/3,根号3/3]求A的范围,急tanA属于[负根号3/3,根号3/3]求A的范围,急tanA属于[负根号3/3,根号3/3]求A的范围,急tanA属于[负根号3/3,根号3/3
tanA属于[负根号3/3,根号3/3]求A的范围,急
tanA属于[负根号3/3,根号3/3]求A的范围,急
tanA属于[负根号3/3,根号3/3]求A的范围,急
tanA属于[负根号3/3,根号3/3]
即-√3/3≤tanA≤√3/3
∴-π/6+kπ≤A≤π/6+kπ,k∈Z
即A的范围[-π/6+kπ.π/6+kπ],k∈Z