1. $5{\tan }^2\theta -{\sec }^2\theta =11\left(n<\theta <2p\mathfrak{i}\right)$

• A. $\frac{7\mathrm{\pi }}{3}$
• B. $\frac{7\mathrm{\pi }}{3}$
• C. $\frac{7\mathrm{\pi }}{3}$
• D. $\frac{7\mathrm{\pi }}{3}$

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