已知sin(TT+α)=-1/3.(1)当α为锐角时已知sin(TT+α)=-1/3.当α为锐角时,求cos(5TT+α)的值
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![已知sin(TT+α)=-1/3.(1)当α为锐角时已知sin(TT+α)=-1/3.当α为锐角时,求cos(5TT+α)的值](/uploads/image/z/7632763-43-3.jpg?t=%E5%B7%B2%E7%9F%A5sin%28TT%2B%CE%B1%29%3D%EF%BC%8D1%2F3.%EF%BC%881%EF%BC%89%E5%BD%93%CE%B1%E4%B8%BA%E9%94%90%E8%A7%92%E6%97%B6%E5%B7%B2%E7%9F%A5sin%28TT%2B%CE%B1%29%3D%EF%BC%8D1%2F3.%E5%BD%93%CE%B1%E4%B8%BA%E9%94%90%E8%A7%92%E6%97%B6%2C%E6%B1%82cos%285TT%2B%CE%B1%29%E7%9A%84%E5%80%BC)
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已知sin(TT+α)=-1/3.(1)当α为锐角时已知sin(TT+α)=-1/3.当α为锐角时,求cos(5TT+α)的值
已知sin(TT+α)=-1/3.(1)当α为锐角时
已知sin(TT+α)=-1/3.
当α为锐角时,求cos(5TT+α)的值
已知sin(TT+α)=-1/3.(1)当α为锐角时已知sin(TT+α)=-1/3.当α为锐角时,求cos(5TT+α)的值
sin(TT+α)=-1/3.-sina=-1/3 ,sina=1/3
cos(5TT+α)=-cosa=-2√2/3
已知sin(TT+α)=-1/3.(1)当α为锐角时已知sin(TT+α)=-1/3.当α为锐角时,求cos(5TT+α)的值
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