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-   -   Trig is a mess. (https://www.askmehelpdesk.com/showthread.php?t=238385)

  • Jul 17, 2008, 01:49 AM
    cpp2011
    Trig is a mess.
    Can anyyone please help me understand proving trig identities, or at least if you could help in any type of trig stuff... :confused:
  • Jul 17, 2008, 03:31 AM
    galactus
    Yes, most likely, if you would post a problem.
  • Jul 17, 2008, 03:36 AM
    Unknown008
    You need to know your formulae and apply them to solve your proof problem. The thing is to 'see' how to solve it. Don't worry, it'll come with practice.
  • Jul 17, 2008, 04:00 AM
    cpp2011
    Quote:

    Originally Posted by galactus
    Yes, most likely, if you would post a problem.

    (sinx+1)/cosX+cotX=tanx
    trig identity proof
    and
    let tan(theta)=5/12 with (theta) in Q I
    find sin2(theta)
    are the two problems that I can't get
  • Jul 17, 2008, 05:43 AM
    galactus
    Is that

    I believe it is.

    Change the cot(x) on the left in the denominator to

    Then, simplify and factor a little. You will see another 1+sin(x) terms and they will cancel.

    The tan will reveal itself as

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