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matotabi
@matotabi
July 2022
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2sin^2 x+5sinx-3=0 может кто-нибудь помочь ?
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Сюррикен
ОДЗ: sin x ≠ 0 ; x≠ pm, m ∈ Z. sin x ≤ модулю 1.
2t^2 + 5t -3 =0
D= 25 + 24 =49;
x(1,2) = -5 + - 7/ 4 = -3;( Нет решений) 0,5;
sin x = 0,5
x = p/6 + 2 pk, k ∈ Z.
x= 5p/6 + 2 pl, l ∈ Z
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Answers & Comments
2t^2 + 5t -3 =0
D= 25 + 24 =49;
x(1,2) = -5 + - 7/ 4 = -3;( Нет решений) 0,5;
sin x = 0,5
x = p/6 + 2 pk, k ∈ Z.
x= 5p/6 + 2 pl, l ∈ Z