sin(α+π⼀6)=3⼀5,则cos(α+2π⼀3)=?

2025-03-24 10:43:03
推荐回答(2个)
回答1:

4/5,

回答2:

sin(α+π/6)=3/5

cos(α+2π/3)
=cos(α+π/6 +π/2)
=-sin(α+π/6)
=-3/5