sin65/6兀的三角函数值怎么求? - 知识问答

sin65/6兀的三角函数值怎么求?

6个回答

sin(65π/6)
=sin(10π＋5π/6)
=sin(5π/6)
=sin(π－π/6)
=sin(π/6)
=1/2
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