1.在三角形ABC中,角A.B.C的所对边的长分别为a,b,c,且a=√5.b=3,sinc=2sinA(1)求c的值(2)求sin(2-π/3)的值2.如图,某市准备在一个湖泊的一侧修建一条直路OC,另一侧修建一条观光大道,它的前一段O
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![1.在三角形ABC中,角A.B.C的所对边的长分别为a,b,c,且a=√5.b=3,sinc=2sinA(1)求c的值(2)求sin(2-π/3)的值2.如图,某市准备在一个湖泊的一侧修建一条直路OC,另一侧修建一条观光大道,它的前一段O](/uploads/image/z/6125423-23-3.jpg?t=1.%E5%9C%A8%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2C%E8%A7%92A.B.C%E7%9A%84%E6%89%80%E5%AF%B9%E8%BE%B9%E7%9A%84%E9%95%BF%E5%88%86%E5%88%AB%E4%B8%BAa%2Cb%2Cc%2C%E4%B8%94a%3D%E2%88%9A5.b%3D3%2Csinc%3D2sinA%EF%BC%881%EF%BC%89%E6%B1%82c%E7%9A%84%E5%80%BC%EF%BC%882%EF%BC%89%E6%B1%82sin%EF%BC%882-%CF%80%2F3%EF%BC%89%E7%9A%84%E5%80%BC2.%E5%A6%82%E5%9B%BE%2C%E6%9F%90%E5%B8%82%E5%87%86%E5%A4%87%E5%9C%A8%E4%B8%80%E4%B8%AA%E6%B9%96%E6%B3%8A%E7%9A%84%E4%B8%80%E4%BE%A7%E4%BF%AE%E5%BB%BA%E4%B8%80%E6%9D%A1%E7%9B%B4%E8%B7%AFOC%2C%E5%8F%A6%E4%B8%80%E4%BE%A7%E4%BF%AE%E5%BB%BA%E4%B8%80%E6%9D%A1%E8%A7%82%E5%85%89%E5%A4%A7%E9%81%93%2C%E5%AE%83%E7%9A%84%E5%89%8D%E4%B8%80%E6%AE%B5O)
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