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yakub2002
@yakub2002
July 2022
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Найдите sin,cos и tg углов А и В треугольника АВС с прямым углом С,если: ВС=8, АВ=17.
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Vad3711
1. Найдем второй катет: AC^2 + BC^2 = AB^2. AC^2 = AB^2 - BC^2.
AC^2 = 17^2 - 8^2 = 225 - 64 = 225. AC = 15.
2. sin A = BC / AB = 8/17. cos A = AC / AB = 15/17. tg A = BC / AC = 8/15.
3. sin B = AC / AB = 15/17. cos B = BC / AB = 8/17. tg B = AC / BC = 15/8 = 1 и 7/8
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Answers & Comments
AC^2 = 17^2 - 8^2 = 225 - 64 = 225. AC = 15.
2. sin A = BC / AB = 8/17. cos A = AC / AB = 15/17. tg A = BC / AC = 8/15.
3. sin B = AC / AB = 15/17. cos B = BC / AB = 8/17. tg B = AC / BC = 15/8 = 1 и 7/8