1.

\[\int_{{}}^{{}}{\frac{x+\sin x}{1+\cos x}\ dx}\] is equal to            [Roorkee 1980; UPSEAT 1999]

A.                 ?\[x\tan \frac{x}{2}+c\]
B.                 \[x\tan \ \frac{x}{2}+c\]
C.                 \[x\tan x+c\]
D.                 \[\frac{1}{2}x\tan x+c\]
Answer» C.                 \[x\tan x+c\]


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