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If $x-a \bigg \{\cos \theta+ \log \tan \bigg(\large\frac{\theta}{2}\bigg)\bigg\}$ and $y= a \sin \theta$ then $\large\frac{dy}{dx}=$

\[\begin {array} {1 1} (1)\;\cot \theta & \quad (2)\;\tan \theta \\ (3)\;\sin \theta & \quad (4)\;\cos \theta \end {array}\]

1 Answer

$(2)\;\tan \theta$
answered Nov 7, 2013 by pady_1
 

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