a·b = |a||b|cos∠(a, b)推导
时间: 2023-11-01 11:21:03 浏览: 42
通过引用中的三角余弦定理,我们可以得到a·b = |a||b|cos(∠OAB)的推导过程。根据三角余弦定理,我们可以得到cos(∠OAB) = cosϕsinθ。而水平方向的路径差ΔH可以表示为ΔH = dHcos(∠OAB),根据引用中的推导,我们可以得到ΔH = dHcosϕsinθ。因此,a·b = |a||b|cos(∠(a, b))的推导过程就是ΔH = dHcosϕsinθ。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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