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在物理竞赛中掌握一些重要的小量近似处理方法,在解决问题时是很有用的。常用的小量近似方法有以下几种:1.对一个小角量α来说,有(1)α=sinα=tanα;(2)α所对的弧长等于它所对的弦长。2.忽略小量(1)在研究一个普通量时,可以忽略小量;(2)在研究一个小量时,可以忽略比它阶数高的
In the physical competition to master some of the important small approximation approach, in solving problems is very useful. Commonly used small approximation methods are as follows: 1. For a small angle α, there is (1) α = sinα = tanα; (2) The arc length for α is equal to the chord length it is for. 2. Neglect of small quantities (1) When studying a normal quantity, neglect a small quantity; (2) When studying a small quantity, ignore it higher than its order