cos(10°+α)=2分之根号3 2sin(α+15°)=根号3求锐角α的度数
问题描述:
cos(10°+α)=2分之根号3 2sin(α+15°)=根号3
求锐角α的度数
答
cos(10°+α)=2分之根号3 α=20°
2sin(α+15°)=根号3 α=45°