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সমাধান কর:

s e c^{2} θ + \tan^{2} θ = \frac{5}{3}, 0 < θ < π

- \frac{π}{6}, - \frac{5 π}{6}

- \frac{π}{6}, \frac{5 π}{6}

\frac{π}{6}, - \frac{5 π}{6}

\frac{π}{6}, \frac{5 π}{6}

ANS : 4

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