MCQOPTIONS
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| 1. |
\[\int{\frac{1+{{\tan }^{2}}x}{1-{{\tan }^{2}}x}\,dx}\] equals to [RPET 2001] |
| A. | \[\log \left( \frac{1-\tan x}{1+\tan x} \right)+c\] |
| B. | \[\log \left( \frac{1+\tan x}{1-\tan x} \right)+c\] |
| C. | \[\frac{1}{2}\log \left( \frac{1-\tan x}{1+\tan x} \right)+c\] |
| D. | \[\frac{1}{2}\log \left( \frac{1+\tan x}{1-\tan x} \right)+c\] |
| Answer» E. | |