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Asked: Tháng Mười 28, 20202020-10-28T12:13:12+00:00 2020-10-28T12:13:12+00:00In: Môn Toán

Tìm góc nhọn a biết tan a+cot a=2

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Tìm góc nhọn a biết tan a+cot a=2

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    1. Gerda

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      Gerda
      2020-10-28T12:14:26+00:00Added an answer on Tháng Mười 28, 2020 at 12:14 chiều

      `tan ∝ + cot ∝ = 2`

      `<=> tan ∝ + 1/(tan ∝) = 2`

      `=> tan² ∝ + 1 = 2tan ∝`

      `<=> tan² ∝ – 2tan ∝ + 1 = 0`

      `<=> tan ∝ = 1`

      `=> ∝ = 45^0`

       

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    2. Nho

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      Nho
      2020-10-28T12:15:05+00:00Added an answer on Tháng Mười 28, 2020 at 12:15 chiều

      Bạn xem hình nhé ^^

      tim-goc-nhon-a-biet-tan-a-cot-a-2

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