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∫ (cos 2x - 1)/(cos 2x + 1) . dx =

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\(\int \frac{cos\,2x - 1}{cos\,2x + 1} . dx =\)

∫ (cos 2x - 1)/(cos 2x + 1) . dx =

(a) tan x – x + c 

(b) x + tan x + c 

(c) x – tan x + c 

(d) -x – cot x + c

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Best answer

Correct answer is (c) x – tan x + c

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