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 70dd86c8..63e3f6bc 100644
--- a/备课组/26届/校本材料.json
+++ b/备课组/26届/校本材料.json
@@ -2859,6 +2859,47 @@
             ],
             "remarks": ""
         },
+        "G20260210": {
+            "id": "G20260210",
+            "name": "两角和与差的正弦余弦正切公式(2)",
+            "filename": "两角和与差的正弦余弦正切公式(2)",
+            "objects": [
+                "K0310001B",
+                "K0310002B"
+            ],
+            "basicknowledges": [
+                "B00256",
+                "B00257"
+            ],
+            "examples_basic": [
+                "018378",
+                "018379",
+                "018380",
+                "018381"
+            ],
+            "work_inclass": [
+                "009567",
+                "009568",
+                "009569",
+                "018383"
+            ],
+            "homework": [
+                "021547",
+                "021563",
+                "021545",
+                "021546",
+                "021548",
+                "021549",
+                "021550",
+                "021562",
+                "021552",
+                "021557",
+                "021566",
+                "021567",
+                "021568"
+            ],
+            "remarks": ""
+        },
         "G20260214": {
             "id": "G20260214",
             "name": "正弦定理",