1.

int(sec^2x.cosec^2x)dx

Answer»

SOLUTION :`INT(sec^2x.cosec^2x)DX`
=`INT1/(sin^2xcos^2x)dx`
=`int(sin^2x+cos^2x)/(sin^2xcos^2x)`
=`int(sec^2+cosec^2)dx`
=tanx-cotx+C


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