AB2 = AC2 + BC2;
AB2 = 242 + 72;
AB = √625;
AB = 25
Sin A = BC/AB = 7/2 = 0,28.
Ответ: Sin A = 0,28.
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AB2 = AC2 + BC2;
AB2 = 242 + 72;
AB = √625;
AB = 25
Sin A = BC/AB = 7/2 = 0,28.
Ответ: Sin A = 0,28.