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-   -   Pre calc / Trig (https://www.askmehelpdesk.com/showthread.php?t=49170)

  • Dec 17, 2006, 07:41 PM
    sweetie_rearea2008
    Pre calc / Trig
    Can anyone tell me how to work/prove this identity?! I just don't understand! Cot*sec =1/sin


    help asap please!
  • Dec 17, 2006, 07:45 PM
    Capuchin
    do you have your definitions for cot and sec in terms of cos and sin and tan?

    It should be straight forward :)
  • Dec 17, 2006, 07:49 PM
    rawpotatoeater37
    cot x * sec x = 1/sin x

    cot x is the opposite of tan x, which is sin x/cos x. Therefore cot x is cos x/sin x.

    sec x is the opposite of cos x. Therefore sec x is 1/cos x.

    cos x/sin x * 1/cos x =...
  • Dec 17, 2006, 07:53 PM
    Capuchin
    Thank you for doing someone's homework for them.
  • Dec 17, 2006, 08:02 PM
    rawpotatoeater37
    Sorry- I'm new at this.
  • Dec 18, 2006, 05:26 AM
    Capuchin
    It's okay, when it's obviously a homework question we like to just hint :)
  • Dec 18, 2006, 09:13 AM
    rawpotatoeater37
    Sounds good
    Thanks!
  • Jan 2, 2007, 03:19 AM
    Capuchin
    I think that your statement of "cot is the opposite of tan" is particularly misleading also. Reciprocal is a better word.

    *nitpick*

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