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0,π/6,π/4,π/3,π/3,π/2,2/3π,3/4π,5/6π,π,7/6π的正弦余弦值是多少?0,π/6,π/4,π/3,π/3,π/2,2/3π,3/4π,5/6π,7/6π,5/4π,4/3π,3/2π,5/3π,7/4π,11/6π,2π刚才还漏掉两个

题目详情
0,π/6,π/4,π/3,π/3,π/2,2/3π,3/4π,5/6π,π,7/6π的正弦余弦值是多少?
0,π/6,π/4,π/3,π/3,π/2,2/3π,3/4π,5/6π,7/6π,
5/4π,4/3π,3/2π,5/3π,7/4π,11/6π,2π
刚才还漏掉两个
▼优质解答
答案和解析
sin0=0
sinπ/6=1/2
sinπ/4=√2/2
sinπ/3=√3/2
sinπ/2=1
sin2/3π=√3/2
sin3/4π=√2/2
sin5/6π=1/2
sinπ=0
sin7/6π=-1/2
sin5/4π=-√2/2
sin4/3π=-√3/2
sin3/2π=-1
sin5/3π=-√3/2
sin7/4π=-√2/2
sin11/6π=-1/2
sin2π=0
cos0=1
cosπ/6=√3/2
cosπ/4=√2/2
cosπ/3=1/2
cosπ/2=0
cos2/3π=-1/2
cos3/4π=-√2/2
cos5/6π=-√3/2
cosπ=-1
cos7/6π=-√3/2
cos5/4π=-√2/2
cos4/3π=-1/2
cos3/2π=-1
cos5/3π=1/2
cos7/4π=√2/2
cos11/6π=√3/2
cos2π=1