diff --git a/02_Day_Data_types/02_day_data_types.md b/02_Day_Data_types/02_day_data_types.md
index 0e82901..5f8d186 100644
--- a/02_Day_Data_types/02_day_data_types.md
+++ b/02_Day_Data_types/02_day_data_types.md
@@ -235,17 +235,17 @@ console.log(Math.log(10))       // 2.302585092994046
 console.log(Math.LN2)           // 0.6931471805599453
 console.log(Math.LN10)          // 2.302585092994046
 
-// Returns the natural logarithm with base 10 of x, Math.log10(x)
+// Returns the common logarithm with base 10 of x, Math.log10(x)
 console.log(Math.log10(2))        // 0.3010299956639812
 console.log(Math.log10(10))       // 1
 
 // Trigonometry
 // Returns the value in radians
-Math.sin(0)
-Math.sin(60)
+Math.sin(0)             // 0
+Math.sin(60)            // -0.3048106211
 
-Math.cos(0)
-Math.cos(60)
+Math.cos(0)             // 1
+Math.cos(60)            // -0.95241298041
 ```
 
 #### Random Number Generator