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August 2022
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Допоможіть розв"язати
3(1-2sin²x)-7sinx=0
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Dимасuk
Verified answer
3 - 6sin²x - 7sinx = 0
6sin²x + 7sinx - 3 = 0
Пусть t = sinx, t ∈ [-1; 1]
6t² + 7t - 3 = 0
D = 49 + 3*6*4 = 121 = 11²
- пе уд. условию
Обратная замена:
, n ∈ Z.
1 votes
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Answers & Comments
Verified answer
3 - 6sin²x - 7sinx = 06sin²x + 7sinx - 3 = 0
Пусть t = sinx, t ∈ [-1; 1]
6t² + 7t - 3 = 0
D = 49 + 3*6*4 = 121 = 11²
- пе уд. условию
Обратная замена:
, n ∈ Z.