在数学中,雅可比-安格展开式(英语:Jacobi-Anger Expansion),或称雅可比-安格恒等式(英语:Jacobi-Anger Identity),是一种将特定形式的复指数函数展开成无穷个谐波分量之和的方法,在物理学(例如在平面波和柱面波之间转换)等领域中有所应用。这个展开式以19世纪数学家卡尔·雅可比和Carl Theodor Anger(英语:Carl Theodor Anger)的名字命名。
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