辅助角三角函数公式1/2sinA-根号3/2cosA=sin(A+B)(tanB=-根号3/2除以1/2)对吗?那B不是=-60度吗?就是sin(A-60°)吗?可答案却是sin(A+60°)为什么?对哈~我怎么这么笨.可以验证啊~幸苦了!可是辅助角公式好
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![辅助角三角函数公式1/2sinA-根号3/2cosA=sin(A+B)(tanB=-根号3/2除以1/2)对吗?那B不是=-60度吗?就是sin(A-60°)吗?可答案却是sin(A+60°)为什么?对哈~我怎么这么笨.可以验证啊~幸苦了!可是辅助角公式好](/uploads/image/z/10183104-0-4.jpg?t=%E8%BE%85%E5%8A%A9%E8%A7%92%E4%B8%89%E8%A7%92%E5%87%BD%E6%95%B0%E5%85%AC%E5%BC%8F1%2F2sinA-%E6%A0%B9%E5%8F%B73%2F2cosA%3Dsin%28A%2BB%29%28tanB%3D-%E6%A0%B9%E5%8F%B73%2F2%E9%99%A4%E4%BB%A51%2F2%EF%BC%89%E5%AF%B9%E5%90%97%3F%E9%82%A3B%E4%B8%8D%E6%98%AF%3D-60%E5%BA%A6%E5%90%97%3F%E5%B0%B1%E6%98%AFsin%28A-60%C2%B0%EF%BC%89%E5%90%97%3F%E5%8F%AF%E7%AD%94%E6%A1%88%E5%8D%B4%E6%98%AFsin%28A%2B60%C2%B0%EF%BC%89%E4%B8%BA%E4%BB%80%E4%B9%88%3F%E5%AF%B9%E5%93%88%7E%E6%88%91%E6%80%8E%E4%B9%88%E8%BF%99%E4%B9%88%E7%AC%A8.%E5%8F%AF%E4%BB%A5%E9%AA%8C%E8%AF%81%E5%95%8A%7E%E5%B9%B8%E8%8B%A6%E4%BA%86%21%E5%8F%AF%E6%98%AF%E8%BE%85%E5%8A%A9%E8%A7%92%E5%85%AC%E5%BC%8F%E5%A5%BD)
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