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int (dx)/(cos(x + 4) cos (x + 2)) is equ...

`int (dx)/(cos(x + 4) cos (x + 2))` is equal to

A

`(1)/(sin 2) log |cos (x + 4)^(2)| + C`

B

`(1)/(2) log |(sec (x + 2))/(sec (x + 4))| + C`

C

`(1)/(sin 2) log |(sec (x + 4))/(sec (x + 2))| + C`

D

`log |(sec (x + 4))/(sec (x + 2))| + C`

Text Solution

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The correct Answer is:
c
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