化簡：tan(18°－x)tan(12°＋x)＋[tan(18°－x)＋tan(12°＋x)]＝ 國語站 題庫 9.12K 大中小設置文字大小 問題詳情：化簡：tan(18°－x)tan(12°＋x)＋[tan(18°－x)＋tan(12°＋x)]＝________．【回答】1知識點：三角恆等變換題型：填空題 TAG標籤：xtan12 化簡 tan12 tan18 #
![化簡：tan(18°－x)tan(12°＋x)＋[tan(18°－x)＋tan(12°＋x)]＝](https://i1.guoyuzhan.com/8d564b1d35eee34807/8c464006/825215/d706125f61b6a0401592cb.gif "化簡：tan(18°－x)tan(12°＋x)＋[tan(18°－x)＋tan(12°＋x)]＝"){kind=small}
[tan(18°－x)＋tan(12°＋x)]＝________．[tan(18°－x)＋tan(12°＋x)]＝________．
