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| 1. |
यदि `x=2 log cot t ` व `y= tan t+ cot t ,` तब `(dy)/(dx) sin 2t +1=`A. ` cos ^(2)t `B. ` sin ^(2 ) t `C. ` cos2t`D. ` 2cos ^(2) t ` |
| Answer» Correct Answer - D | |