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[几何] 三角函数等式问题

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星奔川骛 Posted at 7 days ago |Read mode
在△ABC中,已知cosA=cosy*sinz,cosB=cosz*sinx,cosC=cosx*siny
证明:tanx*tany*tanz =1.

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kuing Posted at 7 days ago

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hbghlyj Posted at 7 days ago
建议楼主看一看置顶公式输入,更方便交流。只是建议。

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2025-4-20 12:19 GMT+8

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