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Ordinary Differential Equations

16. Number of...

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16. Number of solutions of the equation cos 9x. cos 3x = cos 18x. cos 12x, x ϵ [0, π] is

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Q. Number of solution(s) of the equation

\frac{sin x}{cos 3 x} + \frac{sin 3 x}{cos 9 x} + \frac{sin 9 x}{cos 27 x} = 0

in the interval

(0, \frac{π}{4})

Q. The number of solutions of the equation

{cos}^{- 1} x + {cos}^{- 1} \sqrt{1 - x^{2}} = π

Q. The number of real solutions of

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Q. The number of real solutions of;

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Q. The number of solution of the equation sin 5x cos 3x = sin 6x cos 2x in the interval

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