- #1
kuahji
- 394
- 2
The question is "Verify that each equation is an identity."
Problem
tan 8k - tan 8k tan^2 4k = 2 tan 4k
The first thing I tried was to factor out the tangents.
tan 8k (1 - tan^2 4k)
then if I'm doing this correctly
tan 8k (1 - tan 2k) (1 + tan 2k)
But from here I'm stuck, that is if I'm on the right track.
Problem
tan 8k - tan 8k tan^2 4k = 2 tan 4k
The first thing I tried was to factor out the tangents.
tan 8k (1 - tan^2 4k)
then if I'm doing this correctly
tan 8k (1 - tan 2k) (1 + tan 2k)
But from here I'm stuck, that is if I'm on the right track.