diff --git a/备课组/26届/校本材料.json b/备课组/26届/校本材料.json
index 1b647146..bff9af53 100644
--- a/备课组/26届/校本材料.json
+++ b/备课组/26届/校本材料.json
@@ -3326,7 +3326,7 @@
             "objects": [
                 "K0308003B",
                 "K0316001B",
-                "K0316002B"                
+                "K0316002B"
             ],
             "basicknowledges": [
                 "B00151",
@@ -3357,6 +3357,37 @@
                 "006417"
             ],
             "remarks": ""
+        },
+        "G20260217": {
+            "id": "G20260217",
+            "name": "余弦定理(3)",
+            "filename": "余弦定理(3)",
+            "objects": [
+                "K0317001B",
+                "K0317002B"
+            ],
+            "basicknowledges": [
+                "B00154",
+                "B00155"
+            ],
+            "examples_basic": [
+                "018425",
+                "018426",
+                "018427"
+            ],
+            "work_inclass": [
+                "009589",
+                "009590",
+                "009591"
+            ],
+            "homework": [
+                "021634",
+                "021635",
+                "021636",
+                "018428",
+                "018433"
+            ],
+            "remarks": ""
         }
     }
 }
\ No newline at end of file