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cosπ/3,单词大作战cos

已知函数f(x)=cosx/cos(π/6-x),则f(x) f(π/3-x)的值为
已知函数f(x)=cosx/cos(π/6-x),则f(x) f(π/3-x)的值为已知sin(π/3-α)=1/4求cos(2π/3_2α)
已知sin(π/3-α)=1/4求cos(2π/3_2α)求f(x)=-cos05x 根号3sinxcosx的最小正周期和单调增区间
求f(x)=-cos05x 根号3sinxcosx的最小正周期和单调增区间y=cos(x π/3)的函数简图
y=cos(x π/3)的函数简图cos7π/12=-sinπ/12=(√2-√6)/4
cos7π/12=-sinπ/12=(√2-√6)/4
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