Review Note
Last Update: 10/05/2024 09:24 AM
Current Deck: 25考研高等数学公式+概念+定理+典例【5.0版】【数二版】【latex精制版】::01高等数学基础知识::02三角函数公式
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问题
和差公式2
\(\cos (\alpha \pm \beta)=\)________.
\(\cos (\alpha \pm \beta)=\)________.
答案
\(\cos (\alpha \pm \beta)=\cos \alpha \cos \beta \mp \sin \alpha \sin \beta\)
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