trigonometry

Question: If $\tan \theta +\sin \theta =m$and $\tan \theta -\sin \theta =n,$then

1) ${{m}^{2}}-{{n}^{2}}=4mn$

2) ${{m}^{2}}+{{n}^{2}}=4mn$

3) ${{m}^{2}}-{{n}^{2}}={{m}^{2}}+{{n}^{2}}$

4) ${{m}^{2}}-{{n}^{2}}=4\sqrt{mn}$

Solution:

Explanation: No Solution

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