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
| 积化和差公式表格 |
| \(\sin \alpha \cos \beta =\)____ |
| \(\cos \alpha \sin \beta=\)____ |
| \(\cos \alpha \cos \beta=\)____ |
| \(\sin \alpha \sin \beta=\)____ |
答案
| 积化和差公式表格 |
| \(\sin \alpha \cos \beta =\frac{1}{2}[\sin (\alpha+\beta) + \sin (\alpha-\beta) ]\) |
| \(\cos \alpha \sin \beta=\frac{1}{2}[\sin (\alpha+\beta)-\sin (\alpha-\beta)]\) |
| \(\cos \alpha \cos \beta=\frac{1}{2}[\cos (\alpha+\beta)+\cos (\alpha-\beta)]\) |
| \(\sin \alpha \sin \beta=\frac{1}{2}[\cos (\alpha-\beta)-\cos (\alpha+\beta)] .\) |
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