2sinx cosx sin2x 1 0
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1) x=0, tad f(0)= 2sin0+cos2(0+3=4, 2) x=, tad f()= 2sin+cos2(+3=4. . Tātad funkcijas lielākā vērtība ir . 3. Piemērs. Atrast funkcijas f(x)=cos2x(2sinx mazāko vērtību intervālā [ 0; ]. f(x)=cos2x(2sinx= (sin2x(2sin2x+1= ((sinx+1)2+2. No šī pār-veidojuma acīmredzami var nolasīt funkcijas lielāko vērtību 2.
[DOC File]PHƯƠNG TRÌNH LƯỢNG GIÁC
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a) sin2x + 2sinx.cosx – 2cos2x = b) 3sin2x – sin2x – cosx = 0. c) 6sin2x – sinx.cosx – cos2x = 3 d) 4sin2x – 3sin2x – 2cos2x = 4 Bài 6. a) cosx = m + 1 b) mtan2x – 2tanx + 2 = 0 c) (m2 + 2)sin2x + 4msinx.cosx = m2 + 3 d) mcosx – (m + 1)sinx = m e) cosx + 2sinx = m – 1 II.TỔ HỢP XÁC SUẤT: Bài 1.
[DOC File]Открытый урок
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5sin²x+21sinx+4=0 5sin²x-7cosx+1=0 8tg²x+10tgx+3=0 cosx-2sinx=0 cos²x+4cosx=0 sin3x-sin7x=0 7sin2x-2sinx=0 sin2x+10cos²x=0 5cos2x-14cos²x+8=0 3cos2x-14cosx+7=0 11sin2x+6cos²x+6=0 16cosx-11sinx-4=0 Вариант 3 2cos²x-11cosx+5=0. 3cos²+7sinx-5=0. 18tg²x+3tgx-10=0. 5cosx-2sinx=0. 4cos²x+3cosx=0. cos3x-cosx=0. 2sin2x+3cosx=0. 5sin2x ...
[DOCX File]Dr. M.G.R. Educational and Research Institute - 1st Year B ...
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= 1 2 (1-sin 2 x) -1 2 (0-2sinx cosx ) = -sin2x 2 1- sin 2 x . Find . dy dx if y= log 1+ x 1- x . ... Differentiate both sides with respect to `x' y 1 cosx . -sinx + log cosx . dy dx =x. 1 siny cosy dy dx + log siny .1 dy dx log cosx -x coty = log siny +y tanx dy dx = log siny +y tanx log cosx -x coty . If x y = e x-y Prove that y , = logx (1 ...
[DOC File]XTEC
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b) sin 2x – 2cos2 x = 0 ( 2sinx.cosx - 2cos2 x = 0 ( 2cos x.(sinx-cosx) = 0( ( cos x = 0 ( x1 = 90º+360ºk i x2=270º+360ºk ( sinx = cos x ( tg x = 1( x3 = 45º+360ºk i x4=225º+360ºk. 48.Resol aquestes equacions: a) 4sin 2x. cos2 x + 2cos2 x - 2 = 0. Aplico la identitat trigonométrica : 4(1- cos2x).cos2x + 2 cos2x – 2 = 0
[DOC File]Chuyên đề
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(hoặc a.cos2x+b.cosx+c=0, a.tan2x+b.tanx+c=0, a.cot2x+b.cotx+c=0) để giải các phương trình này ta đặt t bằng hàm số LG.. 2. Phương trình bậc nhất đối với sinx và cosx:
[DOC File]A Level Mathematics Questionbanks
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a) tan2x + tanx = 0 90o
[DOC File]İZMİR FEN LİSESİ LİSE 1 MATEMATİK
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Title: İZMİR FEN LİSESİ LİSE 1 MATEMATİK Author: Hasan Korkmaz Last modified by: okul Created Date: 12/31/1987 9:27:00 PM Company: Korkmaz A.S.
[DOC File]TÀI LIỆU ÔN THI ĐẠI HỌC - Toancanduoc's Blog
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a. sinx + sin2x + sin3x = 0 b. cosx – 2cos2x + cos3x = 0 c. 4cos3xcosx – 2cos2x = d. 2sinxsin3x + sin=1 B. Phương trình lượng giác thường gặp
[DOC File]A Level Mathematics Questionbanks
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a) 2sinx cosx = sinx B1. sinx (2cosx 1) = 0 M1 A1. sinx = 0 or cosx = x = 0, 180, 60, 300 A3 (-1 eeoo) [6] b) From (a), have 2x = 0, 180, 60, 300 M1. x = 0, 90, 30, 150 A2 ft [3] 2. a) cos2x + sin2x ( 1 …
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