1.

Let \({\rm{a}} = \frac{{2\sin {\rm{x}}}}{{1 + \sin {\rm{x}} + \cos {\rm{x}}}}{\rm{and\;b}} = \frac{{\rm{c}}}{{1 + \sin {\rm{x}}}}\). then a = b, if c = ?

A. 1 + sin x cos x
B. 1 + sin x – cos x
C. 1 +cos x – sin x
D. 1 – sin x cos x
Answer» C. 1 +cos x – sin x


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