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yamyam70

  • one year ago

How would you verify this identity? 4sin^2 x -1 ____________ = 2 sin x -1 2sin^2 x +1

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  1. Yttrium
    • one year ago
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    Do you know that 4sin^2 x-1 is factorable? :)

  2. yamyam70
    • one year ago
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    is that the difference of two squares?

  3. Yttrium
    • one year ago
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    Yeah, do you know how to factor it out?

  4. yamyam70
    • one year ago
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    OMG thank you thank you thank you!!!!!!!!!!!!!!1111

  5. yamyam70
    • one year ago
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    You knocked some sense on me :D

  6. yamyam70
    • one year ago
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    4sin^2 x -1 , factors as 2sin ++1 (2sin -1) , righT?

  7. Yttrium
    • one year ago
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    Yes. :)

  8. yamyam70
    • one year ago
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    Thanks again :)

  9. Yttrium
    • one year ago
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    No problem. :)

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spraguer (Moderator)
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