sin(arccos(2sin(a)))=
问题描述:
sin(arccos(2sin(a)))=
答
sin(arccos(2sin(a)))=√(1-4sin²a)答案是对的,可以告诉我怎么做吗?谢谢
sin(arccos(2sin(a)))=
sin(arccos(2sin(a)))=√(1-4sin²a)答案是对的,可以告诉我怎么做吗?谢谢