trigonometry

Question: If $m\tan (\theta -30{}^\circ )=n\tan (\theta +120{}^\circ ),$ then $\frac{m+n}{m-n}=$

1) $2\,\cos \,2\theta $

2) $\cos \,\,2\theta $

3) $2\,\sin \,2\theta $

4) $\sin \,\,2\theta $

Solution:

Explanation: No Solution

Trigonometric ratios of sum and difference of two and three

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