Giải tam giác ABC vuông tại A, biết rằng a = 20 cm, B^=35o
∠B = 90o - ∠C = 90o - 35o = 55o
b = asinB = 20.sin35o ≈ 11,47 (cm)
c = asinC = 20.sin55o ≈ 16,38 (cm)
Choose the best answer.
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