tanx-sinx和K(x-sinx)等价无穷小,求K
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tanx-sinx和K(x-sinx)等价无穷小,求K
tanx-sinx和K(x-sinx)等价无穷小,求K
tanx-sinx和K(x-sinx)等价无穷小,求K
tanx=x+1/3x^3+o(X^3),sinx=x-1/6x^3+o(X^3);所以tanx-sinx=1/2x^3+o(x^3);x-sinx=1/6x^3+o(x^3);所以k=3