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-2∫tdt+2∫tan t dt
⇒ 2∫t sec2 t dt+2∫tant 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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