幫我睇下打得岩唔岩?
sin (90+B) = cos B
sin (90-B) = cos B
cos (90+B) = -sin B
cos (90-B) = sin B
tan (90+B) = -1/tanB
tan (90-B) = 1/tanB
聽說可以用CAST圖,邊度有得睇?
收錄日期: 2021-04-23 20:42:57
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100606000051KK01714