diff --git a/题库0.3/LessonObj.json b/题库0.3/LessonObj.json
index 25f1bca1..2b5060e5 100644
--- a/题库0.3/LessonObj.json
+++ b/题库0.3/LessonObj.json
@@ -1092,7 +1092,7 @@
     "K0308005B": {
         "id": "K0308005B",
         "unit_obj": "D03002B",
-        "content": "会解具体的最简三角方程."
+        "content": "会解具体的最简三角方程(指$\\sin x=\\sin \\alpha$, $\\cos x=\\cos \\alpht$, $\\tan x=\\tan\\alpha$)."
     },
     "K0309001B": {
         "id": "K0309001B",