1.

int(tanx+cotx)^2dx

Answer»

Solution :`INT(tanx+cotx)^2dx`
=`int(sinx/cosx+cosx/sinx)^2dx`
=`int((sin^2x+cos^2x)/(cosxsinx))^2`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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