2sin 2x sinx cosx 2cos 2x 3
[DOC File]A Level Mathematics Questionbanks
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a) need values of 2x for 0( 2x(720 2x = 30 B1 cao. 2x = 150, 390, 510 M1(150) M1(+360)
[DOC File]BAB III 78-jkt.sch.id
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sinx + cosx = 1 ; tanx + 1 = secx ; cotx + 1 = cosecx . cos 2x = 2 cos -1 = 1 - 2 sinx. sin 2x = 2 sinx cosx. sehingga soal menjadi bentuk persamaan kuadrat atau bentuk pemfaktoran. Contoh : Tentukan himpunan penyelesaian dari : 1. cos 2x – 3 cos x + 2 = 0; 0 < x < 360. Jawab : 2. sin 4x – 2cos 2x. sin x = 0 ; 0 < x < 180. jawab :
[DOC File]Formulas
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= -x2 cos x + 2x sin x + 2cos x = x2 sin x + 2x cos x - 2sin x = x ln(x) - x = (a sin(bx) - b cos(bx) ) = (a cos(bx) + b sin(bx) ) Ei(x) = Ei(x) = = Ei(x) erf(x) = erf(x) = e-x2 = erf(x) Differential Equations. First order linear + p(t)u = f(t) Multiply by e ( p(t) dt Second order linear homogeneous
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C1: y = 3sin 2x. C2: y = 4 sin2x – 2cos 2x (b) Show that the x-coordinates of the points where C1 and C2 intersect satisfy the equation. 4cos 2x + 3sin 2x = 2 (3) (c) Express 4cos2x + 3sin 2x in the form R cos(2x – α), where R > 0 and 0 < α < 90°, giving the value of α to 2 decimal places. (3)
[DOC File]Analiza I: 3. kolokvij - plonkec na A4
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Title: Analiza I: 3. kolokvij - plonkec na A4 Author: Hema Dobravec & Mitja Perko Last modified by: Perko Created Date: 4/6/2000 3:11:00 PM Other titles
[DOC File]A Level Mathematics Questionbanks
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10. a) Solve the equation cos2x = cosx 0o(x(360o [5] b) Hence write down the solutions to cosx = cosx 0o(x(720o [3] 11. Prove the identity [5] 12. a) Show that 2cos (x 45) = (2(cosx + sinx) [3] b) Hence solve the equations. i) cosx + sinx = 1 0(x
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