None of these

2 cosec x + c

 _{- ²/3 cos x + c}  

- ²/₃ cosec x + c

3 cosec x + c

x log(1 + x² ) + C

cos x

tan x

Sin x

sec x

2x tan^-1 x - log (1+x²) + C

2 [x tan^-1 x - log (1+x²) + C.

2 x tan^-1x + log (1+x²) + C

2[ tan^-1 + log (1+x²)] + C

cos x

x

sin x

tan x

x log (log x)

x log (log x) + x / (log x)

x log (log x) - x / (log x)

log (log x) + x / (log x)