三角形ABC中,向量m=(-1,根号3),向量n=(cosA,sinA)且向量m乘向量n等于1(1)求A(2)若1+sinB/cosB的平方-sinB的平方=-3,求tanC要详细点的过程
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![三角形ABC中,向量m=(-1,根号3),向量n=(cosA,sinA)且向量m乘向量n等于1(1)求A(2)若1+sinB/cosB的平方-sinB的平方=-3,求tanC要详细点的过程](/uploads/image/z/5202090-18-0.jpg?t=%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%2C%E5%90%91%E9%87%8Fm%3D%EF%BC%88-1%2C%E6%A0%B9%E5%8F%B73%EF%BC%89%2C%E5%90%91%E9%87%8Fn%3D%EF%BC%88cosA%2CsinA%EF%BC%89%E4%B8%94%E5%90%91%E9%87%8Fm%E4%B9%98%E5%90%91%E9%87%8Fn%E7%AD%89%E4%BA%8E1%EF%BC%881%EF%BC%89%E6%B1%82A%EF%BC%882%EF%BC%89%E8%8B%A51%2BsinB%2FcosB%E7%9A%84%E5%B9%B3%E6%96%B9-sinB%E7%9A%84%E5%B9%B3%E6%96%B9%3D-3%2C%E6%B1%82tanC%E8%A6%81%E8%AF%A6%E7%BB%86%E7%82%B9%E7%9A%84%E8%BF%87%E7%A8%8B)
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