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 ae25db51..fa5b8620 100644
--- a/备课组/26届/校本材料.json
+++ b/备课组/26届/校本材料.json
@@ -2784,6 +2784,41 @@
             ],
             "remarks": ""
         },
+        "G20260208": {
+            "id": "G20260208",
+            "name": "已知正弦余弦或正切值求角",
+            "filename": "已知正弦余弦或正切值求角",
+            "objects": [
+                "K0308001B",
+                "K0308002B",
+                "K0308003B",
+                "K0308004B",
+                "K0308005B"
+            ],
+            "basicknowledges": [
+                "B00251",
+                "B00252",
+                "B00253"
+            ],
+            "examples_basic": [
+                "018366",
+                "018367",
+                "018369",
+                "012142"
+            ],
+            "work_inclass": [
+                "009562",
+                "009563"
+            ],
+            "homework": [
+                "021529",
+                "021530",
+                "021527",
+                "021531",
+                "003185"
+            ],
+            "remarks": ""
+        },
         "G20260214": {
             "id": "G20260214",
             "name": "正弦定理",