在△ABC中,abc分别为角ABC的对边,b2=ac•cosB=3/4,(1)求1/tanA+1/tanC的值(2)设向量BA•向量BC=3/2,求a+c的值.说明网上此题的答案不全.请您务必亲自详细解答.
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![在△ABC中,abc分别为角ABC的对边,b2=ac•cosB=3/4,(1)求1/tanA+1/tanC的值(2)设向量BA•向量BC=3/2,求a+c的值.说明网上此题的答案不全.请您务必亲自详细解答.](/uploads/image/z/8575640-8-0.jpg?t=%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2Cabc%E5%88%86%E5%88%AB%E4%B8%BA%E8%A7%92ABC%E7%9A%84%E5%AF%B9%E8%BE%B9%2Cb2%3Dac%26%238226%3BcosB%3D3%2F4%2C%EF%BC%881%EF%BC%89%E6%B1%821%2FtanA%2B1%2FtanC%E7%9A%84%E5%80%BC%EF%BC%882%EF%BC%89%E8%AE%BE%E5%90%91%E9%87%8FBA%26%238226%3B%E5%90%91%E9%87%8FBC%3D3%2F2%2C%E6%B1%82a%2Bc%E7%9A%84%E5%80%BC.%E8%AF%B4%E6%98%8E%E7%BD%91%E4%B8%8A%E6%AD%A4%E9%A2%98%E7%9A%84%E7%AD%94%E6%A1%88%E4%B8%8D%E5%85%A8.%E8%AF%B7%E6%82%A8%E5%8A%A1%E5%BF%85%E4%BA%B2%E8%87%AA%E8%AF%A6%E7%BB%86%E8%A7%A3%E7%AD%94.)
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