Question

find the derivative of 3 cosx cotx

Answer 1

I just don't understand why the -sinx was taken out of

Answer 2

-sinx is the derivative of cosx

Answer 3

but why was cosx substracted from -sinx

Answer 4

\[\frac{ d }{ dx }\cot x=-\csc ^{2}x\]
\[\frac{ d }{ dx }\cos x=-\sin x\]