1.

int(1+sinx)/(1-sinx)dx

Answer»

SOLUTION :`I=INT(1+sinx)/(1-sinx)DX`
=`int(1+sinx)^2/cos^2xdx`
=`int(sec^2x+tan^2x+2secxtanx)dx`
=`int(2sec^2x-1+2secxtanx)dx`
=2tanx-x+2secx+c


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