arccos(-1/2)的值为
问题描述:
arccos(-1/2)的值为
答
arccos(-1/2)
=π-arccos(1/2)
=π-π/3
=2π/3
arccos(-1/2)的值为
arccos(-1/2)
=π-arccos(1/2)
=π-π/3
=2π/3