Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread
When you multiply through by (1-t²) (1+t²), you can't get a t^6 term.so I let t = tan ( x/2)
Domain 0< x/2 < 180 ( less than and equal to)
then use t formula
1 + t^2 / 1 - t^2 + 2t / 1 + t^2 = 1 - t^2/ 1 + t^2
1 + t^2 + 2t / 1 - t^4 = 1 - t^2 / 1 + t^2
Then I cross multiply and expand and simplify to get
t^6 - 2t^4 - 2t^3 - 3t^2 - 2t = 0
Not sure where to go from here.
Looks terribly wrong.