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Академик94
@Академик94
August 2022
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Ребята помогите плиззз. у меня зачет
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oganesbagoyan
Verified answer
Найдите 55cos2α , если cosα = 3.5
55cos2α=55(2cos²α-1)=55(2*(3/5)² - 1)=55(18/25-1)=55*(-7)/25 = -77/5 =
- 15, 4
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Академик94
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Verified answer
Найдите 55cos2α , если cosα = 3.555cos2α=55(2cos²α-1)=55(2*(3/5)² - 1)=55(18/25-1)=55*(-7)/25 = -77/5 = - 15, 4