cosx的等价无穷小

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cosx的等价无穷小cosx的等价无穷小cosx的等价无穷小x→π/2时cosx→0(无穷小)∴cosx的等价无穷小为(π/2)-x(x→π/2)

cosx的等价无穷小
cosx的等价无穷小

cosx的等价无穷小
x→π/2时cosx→0(无穷小)
∴cosx的等价无穷小为(π/2)-x
(x→π/2)