Results 1 to 3 of 3

Math Help - Prooving trig question

  1. #1
    Member
    Joined
    Apr 2010
    Posts
    135

    Prooving trig question

    am trying to prove the this trig question but i have been unsucessful.

    Tan A+ Cot A = 2Cosec 2A
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Dec 2009
    Posts
    3,120
    Thanks
    1
    Quote Originally Posted by sigma1 View Post
    am trying to prove the this trig question but i have been unsucessful.

    Tan A+ Cot A = 2Cosec 2A
    Hi sigma1,

    tanA+cotA=\frac{sinA}{cosA}+\frac{cosA}{sinA}=\fra  c{sinA}{sinA}\frac{sinA}{cosA}+\frac{cosA}{cosA}\f  rac{cosA}{sinA}

    =\frac{sin^2A+cos^2A}{sinAcosA}=\frac{1}{sinAcosA}  =\frac{1}{\frac{1}{2}sin2A}

    =\frac{2}{sin2A}=2cosec2A
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Apr 2010
    Posts
    135
    thanks alot i almost had that one i see where i got stuck...
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Prooving
    Posted in the Discrete Math Forum
    Replies: 4
    Last Post: November 11th 2009, 04:24 PM
  2. limit prooving question..
    Posted in the Calculus Forum
    Replies: 8
    Last Post: January 7th 2009, 01:19 AM
  3. Replies: 5
    Last Post: September 29th 2008, 01:06 AM
  4. need help on prooving trig identities!
    Posted in the Trigonometry Forum
    Replies: 9
    Last Post: December 13th 2007, 05:12 AM
  5. Need help with prooving
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: May 12th 2006, 05:09 AM

Search Tags


/mathhelpforum @mathhelpforum