Question

What's the 4th term of (2x-y)^6

Answer 1

\(\large\color{blue}{ \rm tanθ~cotθ=1 }\)


\(\Large\color{red}{ \bf 1 }\)
\(\Large\color{red}{ \bf 1~~~~~~~~~~~~~~1 }\)
\(\Large\color{red}{ \bf 1~~~~~~~~~~~~~2~~~~~~~~~~~~~1 }\)
\(\Large\color{red}{ \bf 1~~~~~~~~~~~3~~~~~~~~~~~~~~3~~~~~~~~~~~~~1 }\)
\(\Large\color{red}{ \bf 1~~~~~~ ~~~~~4~~~~~~~~~~~~~6~~~~~~~~~~~~~4~~~~~~~~~~~~1 }\)
\(\Large\color{red}{ \bf 1~~~~~~~~~5~~~~~~~~~~~10~~~~~~~~~~~10~~~~~~~~~~~~5~~~~~~~~~~~1 }\)
\(\Large\color{blue}{ \bf 1~~~~~~~~6~~~~~~~~~~15~~~~~~~~~~20~~~~~~~~~~~~15~~~~~~~~~~~6~~~~~~~~1 }\)

Answer 2

sorry for the first equation about tan and cot, it's irrelevant.