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1. $\tan 2 θ \tan θ = 1$

Answer: Option B

Explanation:

o p t i o n t e s t করে,θ=30° \Rightarrow \tan 2 θ \tan θ = 1 \Rightarrow \tan 60 ° \tan 30 ° = 1 \Rightarrow \sqrt{3} \times \frac{1}{\sqrt{3}} = 1 \Rightarrow 1 = 1 অন্য Option গুলো দ্বারা সিদ্ধ হয় না।

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