Tỉ số lượng giác của góc nhọn

Tỉ số lượng giác của góc nhọn

Tỉ số lượng giác của góc nhọn

Posted: 04 Aug 2021 08:23 PM PDT

 BÀI TẬPBài 1: Cho ▲ABC  có AC = 3 cm ; BC = 4cm, AB = 5cm. Gọi H là hình chiếu của C trên AB .          a)  Chứng tỏ  :  ▲ABC  vuông         b) Giải tam giác vuông ABC và tính độ dài CH?      Bài 2:...

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