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-   -   Trigonometry (https://www.askmehelpdesk.com/showthread.php?t=563634)

  • Mar 20, 2011, 01:29 AM
    lee1111
    trigonometry
    tan2A+tan3A+tan2Atan3Atan5A=
  • Mar 20, 2011, 11:37 AM
    Unknown008

    I'm guessing those are coefficients of A.

    Use:

  • Mar 20, 2011, 11:42 AM
    lee1111
    I used tan2Atan3Atan5A=tan5A-tan3A-tan2A... is this method correct??
  • Mar 20, 2011, 11:52 AM
    Unknown008

    I don't know this identity, but it's valid :)

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