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sEC^6(x)的不定积分怎么做?

公式: ∫sec²xdx=tanx+C ∫[π/6,π/3]sec^2(4x)dx=1/4tan(4x)|[π/6,π/3] =1/4{tan(4π/3)-tan(2π/3)} =√3/2

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