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If int (cos 4x + 1)/(cot x - tan x) dx =...

If `int (cos 4x + 1)/(cot x - tan x)` dx = A cos 4x + B, then

A

A = -1/2

B

A = -1/8

C

A = -1/4

D

None of these

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The correct Answer is:
B
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