B D2 4d 3 Y E Cos 2x Cos 3x Ans Y Cje C2e32 Sin 2x Cos2x 36 2 Sin 3x Cos 3x 8 30 1 C D 1 (29.1 KiB) Viewed 24 times
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(b) (D2 – 4D+3)y = e" cos 2x + cos 3x Ans y = Cje" + c2e32 – (sin 2x + cos2x) - 36 (2 sin 3x + cos 3x) 8 30 1 = (c) (D – 2D++1) = ce* sin . Ans y = (C1 + 2x)e" – 2* (x sin x + 2 cos x) C2.2 e" 2 (d) (D? +5D + 6) = 0 sec? x(1 + 2 tan x) Ans y = cje + cze te tan (e) (D2 – 1)y = x2 cos x (1-x2) cos Ans y = cie" + c2e-+ x sin x + -2.c -30 2.c = 2
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