sin(-5/6π)等于-sin(π-π/6)吗,后面又怎么算?
问题描述:
sin(-5/6π)等于-sin(π-π/6)吗,后面又怎么算?
答
sin(-5/6π)=-sin(π-π/6)=-sinπ/6=-1/2
sin(-5/6π)等于-sin(π-π/6)吗,后面又怎么算?
sin(-5/6π)=-sin(π-π/6)=-sinπ/6=-1/2