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December 20, 2014

December 20, 2014

Posted by **sadia khan** on Saturday, January 19, 2013 at 3:05am.

- maths -
**sadia khan**, Saturday, January 19, 2013 at 3:07amif y=tan(2tan^-1x/2), show that dy/dx=4(1+y^2)/4+x^2

- maths -
**sadia khan**, Saturday, January 19, 2013 at 3:09amif y=tan(ptan^-1x), show tha (1+x^2)y1 - p(1+y^2)=0

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