यदि $\tan \theta + \sin \theta = m$ तथा $\tan \theta - \sin \theta = n,$ तो
यदि $\tan \theta + \sin \theta = m$ तथा $\tan \theta - \sin \theta = n,$ तो
- [IIT 1970]
- A
${m^2} - {n^2} = 4mn$
- B
${m^2} + {n^2} = 4\,mn$
- C
${m^2} - {n^2} = {m^2} + {n^2}$
- D
${m^2} - {n^2} = 4\sqrt {mn} $
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