diff --git a/notes/.obsidian/plugins/various-complements/data.json b/notes/.obsidian/plugins/various-complements/data.json
index b8ccd22..8074f83 100644
--- a/notes/.obsidian/plugins/various-complements/data.json
+++ b/notes/.obsidian/plugins/various-complements/data.json
@@ -233,9 +233,25 @@
     },
     "2\\cos\\frac{\\alpha+\\beta}2\\sin\\frac{\\alpha-\\beta}2": {
       "2\\cos\\frac{\\alpha+\\beta}2\\sin\\frac{\\alpha-\\beta}2": {
+        "currentFile": {
+          "count": 2,
+          "lastUpdated": 1680607216706
+        }
+      }
+    },
+    "\\cos\\alpha+\\cos\\beta": {
+      "\\cos\\alpha+\\cos\\beta": {
         "currentFile": {
           "count": 1,
-          "lastUpdated": 1680606991534
+          "lastUpdated": 1680607228733
+        }
+      }
+    },
+    "2\\sin\\frac{\\alpha+\\beta}2\\cos\\frac{\\alpha-\\beta}2": {
+      "2\\sin\\frac{\\alpha+\\beta}2\\cos\\frac{\\alpha-\\beta}2": {
+        "currentFile": {
+          "count": 1,
+          "lastUpdated": 1680607233106
         }
       }
     }
diff --git a/notes/.obsidian/workspace.json b/notes/.obsidian/workspace.json
index e4cad75..e354746 100644
--- a/notes/.obsidian/workspace.json
+++ b/notes/.obsidian/workspace.json
@@ -6,17 +6,8 @@
       {
         "id": "4163434766f0d7dc",
         "type": "tabs",
+        "dimension": 83.42303552206674,
         "children": [
-          {
-            "id": "312cde2b80e58872",
-            "type": "leaf",
-            "state": {
-              "type": "outline",
-              "state": {
-                "file": "mat/Funkce/Goniometrické vzorce.md"
-              }
-            }
-          },
           {
             "id": "dc5763b0511370a4",
             "type": "leaf",
@@ -42,7 +33,24 @@
             }
           }
         ],
-        "currentTab": 2
+        "currentTab": 1
+      },
+      {
+        "id": "87d8591d352266dc",
+        "type": "tabs",
+        "dimension": 16.576964477933263,
+        "children": [
+          {
+            "id": "312cde2b80e58872",
+            "type": "leaf",
+            "state": {
+              "type": "outline",
+              "state": {
+                "file": "mat/Funkce/Goniometrické vzorce.md"
+              }
+            }
+          }
+        ]
       }
     ],
     "direction": "vertical"
diff --git a/notes/mat/Funkce/Goniometrické vzorce.md b/notes/mat/Funkce/Goniometrické vzorce.md
index 8048b60..57967fd 100644
--- a/notes/mat/Funkce/Goniometrické vzorce.md	
+++ b/notes/mat/Funkce/Goniometrické vzorce.md	
@@ -8,7 +8,8 @@ Následující vzorce lze mít k písemkám:
 součtové vzorce:
 $\sin\alpha+\sin\beta=2\sin\frac{\alpha+\beta}2\cos\frac{\alpha-\beta}2$
 $\sin\alpha-\sin\beta=2\cos\frac{\alpha+\beta}2\sin\frac{\alpha-\beta}2$
-
+$\cos\alpha+\cos\beta=2\cos\frac{\alpha+\beta}2\cos\frac{\alpha-\beta}2$
+$\cos\alpha-\cos\beta=2\sin\frac{\alpha+\beta}2\sin\frac{\alpha-\beta}2$
 
 ---