Question

tan 4x=
4t(1 - t^2)÷1-6t^2+t^4 where t = tan x​

Answer 1

Answer:

This question seems to make no sense:

1. The left hand side mentions x but not t, while the right hand side mentions t but not x.

2. If the equation were tan 4t = 4t(...

then it still doesn't work:

with t = (pi)/2 the left hand side is tan (2)(pi) = 0 while the right hand side has all sorts of irrational terms in pi and pi^2.

So, what's the real problem? Are you looking for a proof for specific values of x and t?