Calculator.py, Python 3

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import math
def add(x,y):
	return x+y
def subtract(x,y):
	return x-y
def multiply(x,y):
	return x*y
def divided(x,y):
	return x/y
def percentage(x,y):
	return x%y
def power(x,y):
	return x**y
def sqrt(x):
	return sqrt(x)
def factorial(x):
	return factorial(x)
def sin(x):
    return sin(x)
def cos(x):
    return cos(x)
def tan(x):
    return tan(x)
def asin(x):
	return asin(x)
def acos(x):
	return acos(x)
def atan(x):
	return atan(x)
def log10(x):
	return log10(x)
def log(x):
	return log(x)
def randint(x,y):
	return randint(x,y)
print("Select operation.")
print('1.add')
print('2.subtract')
print('3.multiply')
print('4.divided')
print('5.percentage')
print('6.power')
print('7.sqrt')
print('8.factorial')
print('9.sin')
print('10.cos')
print('11.tan')
print('12.asin')
print('13.acos')
print('14.atan')
print('15.log10')
print('16.log')
print('17.randint')
while True:
    choice = input("Enter choice(1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17): ") 
    if choice in (1,17):
        num1 = float(input("Enter first number: "))
        num2=float(input("Enter second number:")) 		
        if choice=='1':
        	print(num1,'+',num2,'=',add(num1,num2)
        elif choice=='2':
        	print(num1,'-',num2,'=',subtract(num1,num2)
        elif choice=='3':
        	print(num1,'*',num2,'=',multiply(num1,num2)
        elif choice=='4':
        	print(num1,'/',num2,'=',divided(num1,num2)
        elif choice=='5':
        	print(num1,'%',num2,'=',percentage(num1,num2)
        elif choice=='6':
        	print(num1,'**',num2,'=',power(num1,num2)
        elif choice=='7':
        	print(math.sqrt(num1))
        elif choice=='8':
        	print(math.factorial(num1))
        elif choice=='9':
        	print(math.sin(num1))
         elif choice=='10':
        	print(math.cos(num1))
         elif choice=='11':
        	print(math.tan(num1))
         elif choice=='12':
        	print(math.asin(num1))
         elif choice=='13':
        	print(math.acos(num1))
         elif choice=='14':
        	print(math.atan(num1))
        elif choice=='15':
            print(math.log10(num1))
         elif choice=='16':
            print(math.log(num1))
         elif choice=='17':
         	print(math.randit(num1,num2)
         	break
    else:
        print("Invalid Input")

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