When I wrote "type" I meant type on forum. Like I do:
$$y'+2\cot(t)y=\cos(t)$$,
then
$$I=\exp\Bigl(2\cot(t)\,dt\Bigr)=\exp \bigl(2\ln \sin(t)\bigr)=\sin^2(t)$$
and so on, not to put image (even typed) on forum.
Don't cut lines too short... Also $\exp $, $\cos$ etc should be upright (in $\LaTeX$ it is \exp, \cos).
No external images! Post attachments
