Results 1 to 2 of 2

Math Help - no.of.solutions

  1. #1
    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. #2
    Banned
    Joined
    Oct 2009
    Posts
    769

    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+

Similar Math Help Forum Discussions

  1. Replies: 1
    Last Post: October 4th 2011, 09:21 PM
  2. solutions
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: November 11th 2010, 06:07 AM
  3. Replies: 6
    Last Post: July 26th 2010, 12:45 PM
  4. help with ODE. *i got no solutions
    Posted in the Differential Equations Forum
    Replies: 1
    Last Post: October 10th 2009, 10:12 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, 01:44 AM

Search Tags


/mathhelpforum @mathhelpforum