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Evaluate `int(dx)/(cot^(2)x-1)` |
Answer» Correct Answer - `(1)/(4)log_(e)|sec 2x+tan 2x|-(x)/(2)+C` `int(dx)/(cot^(2)x-1)=int(sin^(2)x dx)/(cos 2x)` `=(1)/(2)int((1-cos2x)dx)/(cos2x)` `=(1)/(2)[int sec 2x dx-int dx]` `=(1)/(2)[(1)/(2)log_(e)|sec 2x +tan 2x| -x]+C` `=(1)/(4)log_(e)|sec 2x+tan 2x|-(x)/(2)+C` |
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