is equal to

D.

Given:


As we know








∫(2t+2t tan2 t+2 tan t) dt=2∫(t + t tan^2 t+ tan t) dt


2∫tdt+2∫t (sec2(t-1)dt+2∫tan t dt


2∫tdt+2∫t sec2 t dt-2tdt+2tan t dt


2∫t sec2 t dt+2tant dt ….(1)


Applying Integration by parts on ∫t sec2 t dt



∫t sec2 t dt=t tan t-tan t dt ….(2)


Put (2) in(1)



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