1.

`int (cos 2x)/(cosx^(2) sin^(2)x) dx = ?`A. `-cotx - tan x + C`B. `- cot x + tanx + C`C. `cot x - tan x + C`D. `cot x + tanx + C`

Answer» Correct Answer - A
`cos 2x = (cos^(2)x - sin^(2)x)`.


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