更新1:
cosZ=b/c sinX=c/b tanx=b/a tanZ=a/b
cosZ=b/c sinX=c/b tanx=b/a tanZ=a/b
收錄日期: 2021-05-01 15:08:41
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140605103503AAQ5MLj