Results 1 to 3 of 3

Thread: Proving Trig Identities

  1. March 10th 2010, 05:26 PM #1
    orochimaru700
    orochimaru700 is offline
    Newbie
    Joined
    Jan 2010
    Posts
    15

    Post Proving Trig Identities

    Help proving these identities


    1.) tanX - tanY/1+tanX = cotY - cotX/cotXcotY+1<br /> <br /> 2.) sin 5X + Sin 3X/sin 5X - sin 3X = tan 4X/tanX
    Follow Math Help Forum on Facebook and Google+
  2. March 10th 2010, 05:35 PM #2
    bigwave
    bigwave is offline
    Super Member bigwave's Avatar
    Joined
    Nov 2009
    From
    honolulu
    Posts
    578
    Quote Originally Posted by orochimaru700 View Post
    Help proving these identities


    1.) tanX - tanY/1+tanX = cotY - cotX/cotXcotY+1<br /> <br /> 2.) sin 5X + Sin 3X/sin 5X - sin 3X = tan 4X/tanX
    redid your latex hope this is what you are asking;

    \tan{x}-\frac{\tan{y}}{1+\tan{x}} = \cot{y} - \frac{\cot{x}}{\cot{y}+1}

    \sin{5x}+\frac{\sin{3x}}{\sin{5x}}-\sin{3x}=\frac{tan4x}{\tan{x}}
    Follow Math Help Forum on Facebook and Google+
  3. March 10th 2010, 05:58 PM #3
    orochimaru700
    orochimaru700 is offline
    Newbie
    Joined
    Jan 2010
    Posts
    15
    yup that's it, thanks...
    Follow Math Help Forum on Facebook and Google+
« simplifying using half angle identity | Solving for x »

Similar Math Help Forum Discussions

  1. [SOLVED] Proving Trig identities help!
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: March 28th 2011, 04:33 AM
  2. proving trig identities
    Posted in the Trigonometry Forum
    Replies: 5
    Last Post: November 12th 2009, 04:14 AM
  3. Proving Trig Identities
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: April 23rd 2009, 04:13 PM
  4. Trig/Proving Identities
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: March 17th 2008, 01:44 PM
  5. HELP! Trig-Proving Identities
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: April 22nd 2006, 08:48 AM

Search Tags


/mathhelpforum @mathhelpforum