from math import acos, cos, sin
# 関数定義
def distance_lat_long(slat, slon, elat, elon):
dist = 6371.01 * acos(
sin(slat) * sin(elat) + cos(slat) * cos(elat) * cos(slon - elon)
)
return dist
print(distance_lat_long(23.5, 67.5, 25.5, 69.5))
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