yamyam70
  • yamyam70
How would you verify this identity? 4sin^2 x -1 ____________ = 2 sin x -1 2sin^2 x +1
Trigonometry
schrodinger
  • schrodinger
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Yttrium
  • Yttrium
Do you know that 4sin^2 x-1 is factorable? :)
yamyam70
  • yamyam70
is that the difference of two squares?
Yttrium
  • Yttrium
Yeah, do you know how to factor it out?

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yamyam70
  • yamyam70
OMG thank you thank you thank you!!!!!!!!!!!!!!1111
yamyam70
  • yamyam70
You knocked some sense on me :D
yamyam70
  • yamyam70
4sin^2 x -1 , factors as 2sin ++1 (2sin -1) , righT?
Yttrium
  • Yttrium
Yes. :)
yamyam70
  • yamyam70
Thanks again :)
Yttrium
  • Yttrium
No problem. :)

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