Results 1 to 1 of 1

Math Help - [SOLVED] Quadratic Trigonometric Equations

  1. #1
    Junior Member
    Joined
    Oct 2005
    Posts
    37

    Smile [SOLVED] Quadratic Trigonometric Equations

    Hi,
    I've studying for my math test today and found two questions that I couldn't figure out.
    a) 3sinx + 3cos2x = 2
    b) 2sec^2x -3 + tanx = 0

    I've been trying to use the double identity for cos2x but nothing worked when I was trying to factor it. I know that I need to find the zeroes but I'm can't manage to factor it. Same with the second question.
    I would really appreciate if you could show me how to factor them, I can solve it from there by myself.
    Thanks a lot.

    EDIT: I managed to solve them both... apparently I had to use the quadratic formula
    Thanks anyways.
    Last edited by dgolverk; December 13th 2008 at 05:50 PM.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Solving Quadratic Trigonometric Equations
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: April 30th 2011, 02:03 PM
  2. [SOLVED] Quadratic Trigonometric Equations
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: November 15th 2009, 02:12 AM
  3. [SOLVED] Help with Trigonometric Equations
    Posted in the Trigonometry Forum
    Replies: 6
    Last Post: May 10th 2009, 09:25 AM
  4. [SOLVED] Solving Trigonometric equations 2
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: March 24th 2009, 01:32 PM
  5. Quadratic Trigonometric Equations Help
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: January 27th 2009, 12:35 PM

Search Tags


/mathhelpforum @mathhelpforum