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Q.

1+cos4xcotx-Tanxdx=

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a

18cos4x+c

b

14cos4x+c

c

-14cos4x+c

d

-18cos4x+c

answer is D.

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Detailed Solution

     1+cos 4xcot x-tan xdx =2cos22x2cot2xdx    cot x-tan x=2cot 2x =12 2 sin 2x cos 2x dx =12 sin 4x dx =12-cos4 x4+c =-18 cos4x+c

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