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If the integral int(5tanx)/(tanx-2)dx=x+...

If the integral `int(5tanx)/(tanx-2)dx=x+a"ln"|sinx-2cosx|+k` then a is equal to (1) `-1` (2) `-2` (3) 1 (4) 2

A

`-1`

B

`-2`

C

1

D

2

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