Results 1 to 2 of 2

Thread: no.of.solutions

  1. October 17th 2010, 05:05 AM #1
    grgrsanjay
    grgrsanjay is offline
    Member grgrsanjay's Avatar
    Joined
    May 2010
    From
    chennai,tamil nadu
    Posts
    143
    Thanks
    1

    no.of.solutions

    find the no.of solutions of
    1+\cos10x\cos6x=2\cos^2 x + \sin^2 x
    where 20○<x<80○

    where ○ refers degree
    Follow Math Help Forum on Facebook and Google+
  2. October 17th 2010, 10:09 AM #2
    wonderboy1953
    wonderboy1953 is offline
    Banned
    Joined
    Oct 2009
    Posts
    772

    Simplify

    Quote Originally Posted by grgrsanjay View Post
    find the no.of solutions of
    1+\cos10x\cos6x=2\cos^2 x + \sin^2 x
    where 20○<x<80○

    where ○ refers degree
    subtract sin^2x from both sides, then use a well-known trig identity to simplify.
    Follow Math Help Forum on Facebook and Google+
« Inequality help | Proving an identity. »

Similar Math Help Forum Discussions

  1. Infinitely many solutions (Edit: No solutions)
    Posted in the Algebra Forum
    Replies: 1
    Last Post: October 4th 2011, 08:21 PM
  2. solutions
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: November 11th 2010, 05:07 AM
  3. For which values of k are there no solutions, 1 solution, inifinite solutions.
    Posted in the Advanced Algebra Forum
    Replies: 6
    Last Post: July 26th 2010, 11:45 AM
  4. help with ODE. *i got no solutions
    Posted in the Differential Equations Forum
    Replies: 1
    Last Post: October 10th 2009, 09:12 AM
  5. Solutions to ODE y'(t) = t^2 +y(t)^2
    Posted in the Differential Equations Forum
    Replies: 1
    Last Post: January 18th 2009, 12:44 AM

Search Tags


/mathhelpforum @mathhelpforum