Results 1 to 6 of 6

Math Help - sin(4x)/1+cos(4x)=tan(2x)

  1. #1
    Member
    Joined
    Feb 2009
    Posts
    101
    Awards
    1

    sin(4x)/1+cos(4x)=tan(2x)




    I would like to do more research on this type of question. what is the topic called?

    also if anyone could help me with the question please.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,786
    Thanks
    1570
    Trigonometric Identities...
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by decoy808 View Post



    I would like to do more research on this type of question. what is the topic called?

    also if anyone could help me with the question please.
    The given identity is easily proved using the double angle formula for sin and cos.
    Last edited by mr fantastic; April 20th 2011 at 06:19 AM.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Member
    Joined
    Feb 2009
    Posts
    101
    Awards
    1



    need help from here. trying to cancel out LHS and RHS but cannot seem to get tan(2x)
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by decoy808 View Post



    need help from here. trying to cancel out LHS and RHS but cannot seem to get tan(2x)
    LHS =
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Member
    Joined
    Mar 2011
    From
    Awetuouncsygg
    Posts
    182
    Thanks
    12
    Uhm... well, it would be easier to consider an y = 2x.
    Follow Math Help Forum on Facebook and Google+

Search Tags


/mathhelpforum @mathhelpforum