馀切
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(馀(yú )切(qiē ),余(yú )切(qiē ))
直(zhí )角(jiǎo )三(sān )角(jiǎo )形(xíng )任(rèn )意(yì )一(yī )锐(ruì )角(jiǎo )的(de )邻(lín )边(biān )和(hé )对(duì )边(biān )的(de )比(bǐ ),叫(jiào )做(zuò )该(gāi )锐(ruì )角(jiǎo )的(de )馀(yú )切(qiē )。用(yòng )ctg(角(jiǎo ))表(biǎo )示(shì )。参(cān )见(jiàn )“三(sān )角(jiǎo )函(hán )数(shù )”。
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