Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: Calculeu l'angle que formen [u with rightwards arrow on top] i [v with rightwards arrow on top] [u with rightwards arrow on top equals open parentheses 3 comma negative 5 close parentheses] i [v with rightwards arrow on top equals open parentheses 15 comma 9 close parentheses] [alpha equals angle open parentheses u with rightwards arrow on top comma v with rightwards arrow on top close parentheses equals]_____o [u with rightwards arrow on top equals open parentheses square root of 3 comma 1 close parentheses] i [v with rightwards arrow on top equals open parentheses negative 2 square root of 3 comma 2 close parentheses] [alpha equals angle open parentheses u with rightwards arrow on top comma v with rightwards arrow on top close parentheses equals]_____o
Right answer summary: part 1: 90; part 2: 120
Question state: todo