求下列各式的值 已知cos(a-π/3)=12/13,π/3小于a小于π/2,求cosa
问题描述:
求下列各式的值 已知cos(a-π/3)=12/13,π/3小于a小于π/2,求cosa
答
因为cos(a-π/3)=12/13,π/3
求下列各式的值 已知cos(a-π/3)=12/13,π/3小于a小于π/2,求cosa
因为cos(a-π/3)=12/13,π/3