Do some definite integral calculation.



Dear Maxima users,

I've the following equations:

\[\sin \left( \theta  \right) = a{x^{^2}} + bx + c\]

and

\[y = \int_0^x {\tan } \left( \theta  \right)dx\]

I want to obtain the expression of y as the function of x.  How should
I write the code within maxima? 

Thanks in advance. 
-- 
Hongyi Zhao <hongyi.zhao at gmail.com> 
Xinjiang Technical Institute of Physics and Chemistry
Chinese Academy of Sciences 
GnuPG DSA: 0xD108493
2009-5-4