Evaluate:
(i) `int(sin^2x)/(1+cosx)\ dx`
(ii) `int(sec^2x+cos e c^2x)\ dx`

Explanation

(i) `int(sin^2x)/(1+cosx)\ dx`


`=int(1-cos^2x)/(1+cosx)\ dx`


`=int(1-cosx)\dx`


`=x-sinx+C`


(ii) `int(sec^2x+cos e c^2x)\ dx`


`=tanx-cotx+C`