特殊三角形的正余弦

Question

如题所述

Answer 1

Answer 2

sin 0° = 0
cos 0° = 1
tan 0° = 0
sin 30° = 1/2
cos 30° = √3/2
tan 30° = √3/3
sin 45° = √2/2
cos 45° = √2/2
tan 45° = 1
sin 60° = √3/2
cos 60° = 1/2
tan 60° = √3
sin 90° = 1
cos 90° = 0本回答被网友采纳