已知cos(π/6+α)=√3/3,则cos(5π/6-α)的值为 ( )
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![已知cos(π/6+α)=√3/3,则cos(5π/6-α)的值为 ( )](/uploads/image/z/6882443-35-3.jpg?t=%E5%B7%B2%E7%9F%A5cos%28%CF%80%2F6%2B%CE%B1%29%3D%E2%88%9A3%2F3%2C%E5%88%99cos%285%CF%80%2F6-%CE%B1%29%E7%9A%84%E5%80%BC%E4%B8%BA+%28+%29)
已知cos(π/6+α)=√3/3,则cos(5π/6-α)的值为 ( )
已知cos(π/6+α)=√3/3,则cos(5π/6-α)的值为 ( )
已知cos(π/6+α)=√3/3,则cos(5π/6-α)的值为 ( )
cos(5π/6-a)=cos(a-5π/6)=cos(a+6/π-π)=负3分之根号3 很高兴为您回答题目.祝您天天好心情.