化简：tan(18°－x)tan(12°＋x)＋[tan(18°－x)＋tan(12°＋x)]＝ 问题详情：化简：tan(18°－x)tan(12°＋x)＋[tan(18°－x)＋tan(12°＋x)]＝________．【回答】1知识点：三角恒等变换题型：填空题...
![化简：tan(18°－x)tan(12°＋x)＋[tan(18°－x)＋tan(12°＋x)]＝](https://i1.guowenba.com/2a3f740786fedf90c5/2b2f7f1c/253b2a/706f2d45d2a69c98d71e46-s.gif "化简：tan(18°－x)tan(12°＋x)＋[tan(18°－x)＋tan(12°＋x)]＝")