Update math 함수.txt 주석 추가

math 함수.txt

 Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:05:16) [MSC v.1915 32 bit (Intel)] on win32
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->>> #count
+>>> #count                                              #count함수와 replace 활용 예시
+
 >>> a="11111"
 >>> a.count
 <built-in method count of str object at 0x042F2B20>
@@ -20,10 +21,11 @@ TypeError: replace() argument 2 must be str, not int
 >>> a.replace("111","2")            
 '211'
 >>> 
->>> import math
+>>> import math                             #math 함수를 통해 pi값과 sin값 써보기
+                                            
 >>> math.pi
 3.141592653589793
->>> import math as m
+>>> import math as m                                #impoer math as k 구문 써보기 
 >>> m.pi
 3.141592653589793
 >>> import math as k