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35√3 = ½ • 14 • 10 • sin ∠ Q
35√3 = 70 • sin ∠ Q
sin ∠ Q = 35/70√3
sin ∠ Q = ½√3
∠ Q = 60⁰
Jadi, besar ∠ Q adalah 60⁰ (Jawaban D)