已知角a的终边与单位圆相交于点P(-0.5,0.5根号3) 则sina等于?
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![已知角a的终边与单位圆相交于点P(-0.5,0.5根号3) 则sina等于?](/uploads/image/z/10336573-37-3.jpg?t=%E5%B7%B2%E7%9F%A5%E8%A7%92a%E7%9A%84%E7%BB%88%E8%BE%B9%E4%B8%8E%E5%8D%95%E4%BD%8D%E5%9C%86%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9P%EF%BC%88-0.5%2C0.5%E6%A0%B9%E5%8F%B73%EF%BC%89+%E5%88%99sina%E7%AD%89%E4%BA%8E%3F)
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已知角a的终边与单位圆相交于点P(-0.5,0.5根号3) 则sina等于?
已知角a的终边与单位圆相交于点P(-0.5,0.5根号3) 则sina等于?
已知角a的终边与单位圆相交于点P(-0.5,0.5根号3) 则sina等于?
0.5根号3
角a的终边经过点P(-0.5,0.5根号3),即角a是第二象限角 .sina=0.5根号3/1