cos not defined

[thomaswelton]

Traceback (most recent call last):
File "pokecli.py", line 120, in
main()
File "pokecli.py", line 117, in main
bot.take_step()
File "/Users/administrator/PokemonGo-Bot/bot.py", line 29, in take_step
self.stepper.take_step()
File "/Users/administrator/PokemonGo-Bot/stepper.py", line 39, in take_step
self.api.walk(self.config.walk, *position,walking_hook=self.walking_hook)
File "/Users/administrator/PokemonGo-Bot/pgoapi/pgoapi.py", line 114, in walk
dist = distance(i2f(self._position_lat), i2f(self._position_lng), lat, lng)
File "/Users/administrator/PokemonGo-Bot/pgoapi/utilities.py", line 46, in distance
a = 0.5 - cos((lat2 - lat1) * p)/2 + cos(lat1 * p) * cos(lat2 * p) * (1 - cos((lon2 - lon1) * p)) / 2
NameError: global name 'cos' is not defined

[Tadelsucht]

#126