Question 919184
sinxcosx(tanx-cotx)
{{{sin(x)cos(x)((tan^2(x) - 1)/tan(x) ))}}}
( cosx/sinx)(sinxcosx)(tan^2x - 1)
cos^2 (tan^2x - 1)
sin^2 - cos^2
(1 - cosx^2) - cosx^2
1 - 2cosx^2