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Evaluate: (i) int(tanx+cotx)^2\ dx (ii) ...

Evaluate: (i) `int(tanx+cotx)^2\ dx` (ii) `int(1-cos2x)/(1+cos2x)\ dx`

A

`tanx+cotx+C`

B

`secx+cosecx+C`

C

`tanx-cotx+C`

D

`secx-cosecx+C`

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