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[DOC File]КОНТРОЛЬНЫЕ РАБОТЫ ПО АЛГЕБРЕ И НАЧАЛАМ …
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в) sin 2x + cos2x = 1 г) sin x = cos 3x д) cos 5x + cos 3x + cos x = 0 а) 3 sin x – 7 cos x = 0 б) 4 sin2x + sinx cosx – cos2x = 1 в) sin 2x + sin2x = 1 г) cos x = sin 3x д) sin 5x + sin 3x – sin 4x = 0 …
sin 2x 3 cos 2x 45

[DOC File]A Level Mathematics Questionbanks
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sin x = ( cos x = M1 A1. 90
sin 2x 3 cos 2x 30

[DOC File]2sinx –1 = 0
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cos 2x = 1 + sin 2x 1 – 2sin2x = 1 + 2sin x.cos x. 2sin2x + 2sin x. cos x = 0. 2sin x (sin x + cos x) = 0 so sin x = 0 or tan x = –1 etc. sin x.cos12º – cos x.sin12º = sin(x – 12º) = etc. 3cos 2x – sin 2x – 1 = 0 3(cos2x – sin2x) – 2sin x.cos x – (cos2x + sin2x) = 0. 3cos2x – 3sin2x – 2sin x.cos x – cos2x – sin2x ...
1 3 x 2 1 0

[DOC File]Основні способи розв'язування тригонометричних рівнянь
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3) sin2x – cosx = 0; 4) sin7x + sinx = 0; 5) cos3x = cosx; 6) cos2x – sin2x = 1; 7) 1 – cos = sin; 8) sin5x – sinx = sin2x; 9) cos5x + cos3x = cos2x + cos4x; 10) cosx + sinx = cos2x. 503. Розв'язати рівняння, використовуючи формул пониження степеня:
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[DOC File]NAME_________________________________________DATE
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20. 21. sin θ + cot θ cos θ = csc θ. 22. 1 – cos2x = sin x cos x tan x 23. (sin x – cos x)2 = 1 – 2 sin x cos x. 24. cos2x = sec2x – tan2x – sin2x 25. 26. sin 2x = 2 cot x sin2x 27. 28. 29. Solve each equation for all values of the variable in the interval between 0˚ and 360˚. 3. 0. 3 cos θ = cos θ – 1 31. -2 sin θ – = 0 ...
prove cos3x 4cos 3x 3cosx

[DOC File]第1章：有向數
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Solve the equation cos 2x ( 1 ( 0 graphically. 3. The figure shows the graph of y ( cos(x ( 60() for 0( ( x ( 360(. Solve the equation cos(x ( 60() ( 0 graphically. 4. The figure shows the graph of y ( 4 cos 2x for 0( ( x ( 180(. Solve the equation 4 cos 2x ( 0 graphically. 5.
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[DOC File]Topic name Homework Sheet 123 Name
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Find all possible values of sin x if cos x = 0.25. sin2x = 1 ( cos2x = 1 ( (0.25)2 = 1 (0.0625 = 0.9375. sin x = (x = 0.968 or (0.968. 3 Find the exact value of sin x if cos x = and x is in the fourth quadrant. Third side of triangle = From triangle sin x = but x is in the fourth quadrant, so sin x = (. 3
cos3x 4cos 2x 3cosx 4 0

[DOC File]WordPress.com
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Given cos 2π/9 = 0.766, find an equivalent trig expression to show that sin 13 π/18 = 0.766 Apply compound angle formulas to determine the identity for each: (a) cos (π/2 +x)
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[DOC File]2) Discutere la seguente equazione rispetto ai limiti indicati
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b)4 cos2x- 2m cos x+1=0 30°
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[DOC File]XTECBlocs
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2.+cos 2x – sin2 x = 0 ( Apliquem la identitat trigonométrica per posar sin2 en funció de cos2 : 1 – cos x + cos2x – ( 1- cos2x) = 0 (2 cos2x – cos x = 0 (cos x ( 2 cos x – 1) = 0 (cos x = 0 (x1= 90º+360ºk ; x2 = 270º+360ºk (cos x = ½ (x3 = 60º + 360ºk i x4 = 300º + 360ºk. 49.
sin 2x 3 cos 2x 30

4 cos x cos2x 1 0 3