设所给两余弦长为A，B。角为w。 则所求弦长 X = （A+B）/（2COSw）。
鎵�璺熷笘: NABC60 : 脫脙脫脿脧脪露篓脌铆赂眉录貌碌楼隆拢 2023-05-10 04:08:47
驴脡碌脙脪禄录貌碌楼鹿芦脢陆:2023-05-10 04:19:52 [鐐瑰嚮:2194]
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