If \[\tan \theta =\frac{\sin \alpha -\cos \alpha }{\sin \alpha +\cos \ – McqOptions

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1.	If \[\tan \theta =\frac{\sin \alpha -\cos \alpha }{\sin \alpha +\cos \alpha },\]then \[\sin \alpha +\cos \alpha \] and \[\sin \alpha -\cos \alpha \] must be equal to [WB JEE 1971]
A.	\[\sqrt{2}\cos \theta ,\,\,\sqrt{2}\sin \theta \]
B.	\[\sqrt{2}\sin \theta ,\,\,\sqrt{2}\cos \theta \]
C.	\[\sqrt{2}\sin \theta ,\,\,\sqrt{2}\sin \theta \]
D.	\[\sqrt{2}\,\cos \theta ,\,\,\sqrt{2}\,\cos \theta \]
Answer» B. \[\sqrt{2}\sin \theta ,\,\,\sqrt{2}\cos \theta \]

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