Q. 57

Mark (√) against the correct answer in each of the following:



A. - log |cos x – sin x| + C

B. log |cos x – sin x| + C

C. log |cos x + sin x | + C

D. none of these

Answer :

Formula :-




Therefore ,


(Rationalizing the denominator)



Put cos x - sin x = t


(- sin x - cos x) dx = dt


(sin x + cos x) dx = -dt



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