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a
-1
b
1
c
0
d
2
answer is B.
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Detailed Solution
limx→0log1+x+x2+log1-x+x2secx - cos x= =limx→0 log1+x22-x21-cos2x/cosx =limx→0 log1+x2+x4sin x tan x =limx→0 log1+x21+x2x21+x2 x2 1+x2.1sinxx.tanxx.x2 = 1 as limx→0 log1+xx=1