几道三角函数的数学题1.△ABC中,角A=120°,AB=4,AC=2,则tanB的值是__2最好要有过程,无论你过程多么简略,只要能让我看懂就行
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![几道三角函数的数学题1.△ABC中,角A=120°,AB=4,AC=2,则tanB的值是__2最好要有过程,无论你过程多么简略,只要能让我看懂就行](/uploads/image/z/5401445-5-5.jpg?t=%E5%87%A0%E9%81%93%E4%B8%89%E8%A7%92%E5%87%BD%E6%95%B0%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%981.%E2%96%B3ABC%E4%B8%AD%2C%E8%A7%92A%3D120%C2%B0%2CAB%3D4%2CAC%3D2%2C%E5%88%99tanB%E7%9A%84%E5%80%BC%E6%98%AF__2%E6%9C%80%E5%A5%BD%E8%A6%81%E6%9C%89%E8%BF%87%E7%A8%8B%2C%E6%97%A0%E8%AE%BA%E4%BD%A0%E8%BF%87%E7%A8%8B%E5%A4%9A%E4%B9%88%E7%AE%80%E7%95%A5%2C%E5%8F%AA%E8%A6%81%E8%83%BD%E8%AE%A9%E6%88%91%E7%9C%8B%E6%87%82%E5%B0%B1%E8%A1%8C)
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