Tính giá trị tanB,tanC biết B, C là 2 góc nhọn của tam giác vuông ABC

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  • hoahoa.nhynhay: . 11/5/2018 1:39:46 PM
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  • hoahoa.nhynhay: . 11/5/2018 1:39:50 PM
  • hoahoa.nhynhay: ..................... 11/5/2018 1:39:52 PM
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