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OhYes
@OhYes
July 2022
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DashaNikitina451
cos3x*cos2x - sin3x*sin2x = 0
cos(3x+2x) = 0
cos5x = 0
5x =
x =
cos²x + 3sin²x+ 2
sinxcosx = 0
3sin²x + 2
sinxcosx + cos²x = 0
Делим все это на cos²x
3tg²x + 2
tgx + 1 = 0
Пусть t = tgx
3t² + 2
t + 1 = 0
D =
- 4*3*1 = 0
D = 0 => 1 корень.
t =
tgx =
x =
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Answers & Comments
cos3x*cos2x - sin3x*sin2x = 0
cos(3x+2x) = 0
cos5x = 0
5x =
x =
cos²x + 3sin²x+ 2sinxcosx = 0
3sin²x + 2sinxcosx + cos²x = 0
Делим все это на cos²x
3tg²x + 2tgx + 1 = 0
Пусть t = tgx
3t² + 2t + 1 = 0
D = - 4*3*1 = 0
D = 0 => 1 корень.
t =
tgx =
x =