在△ABC中,内角A,B,C所对的边分别是a,b,c,已知8b=5c,C=2B,则cosC=( )
一个人从A点出发向北偏东30°方向走到B点,再从B点出发向南偏东15°方向走到C点,那么∠ABC等于____ 度
How often does Tom eat?
food
time(s) a week
bread
7
chicken
6
potatoes
14
apples
3