π2<θ<π\frac{\pi}{2}<\theta<\pi এবং sinθ=513\sin \theta=\frac{5}{13} হলে tanθ+sec(θ)cotθ+cosec(θ)\frac{\tan \theta+\sec (-\theta)}{\cot \theta+\operatorname{cosec}(-\theta)} এর মান

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