power-reducing formula problem

[samanthabroooke]

so i was given tan(squared)2x and i'm trying to plug it into the power reducing
formula which is tan(squared)u=1-cos2u/1+cos2u.

How do i go about doing this?
Thanks,

 

[Deleted member 4993]

so i was given tan(squared)2x and i'm trying to plug it into the power reducing
formula which is tan(squared)u=1-cos2u/1+cos2u........(1)

How do i go about doing this?
Thanks,

Replace 'u' by '2x' in (1) - then simplify.

Please show us your work, indicating exactly where you are stuck - so that we may know where to begin to help you.

 

[BigGlenntheHeavy]

\(\displaystyle If \ u \ = \ 2x, \ then \ 2u \ = \ ?\)