Results 1 to 2 of 2

Thread: Prove that ((1+sin(15x))(1-sin(x))/(1-sin(5 x))(1+sin(3x)))= ....

  1. March 22nd 2011, 09:15 AM #1
    mia25
    mia25 is offline
    Newbie
    Joined
    Mar 2011
    Posts
    9

    Prove that ((1+sin(15x))(1-sin(x))/(1-sin(5 x))(1+sin(3x)))= ....

    ((1+sin(15x))(1-sin(x))/(1-sin(5 x))(1+sin(3x)))=

    {16(sinx)^4 - 8(sinx)^3 - 16(sinx)^2 + 8sinx +1}^2


    Any idea that help in solving this equality is appreciated.
    Last edited by mr fantastic; March 23rd 2011 at 03:47 AM. Reason: Re-titled.
    Follow Math Help Forum on Facebook and Google+
  2. March 22nd 2011, 12:25 PM #2
    pickslides
    pickslides is offline
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,234
    Thanks
    26
    I don't know the whole solution yet but start on the left hand side with \displaystyle \frac{a}{b}\div \frac{c}{d}= \frac{a}{b}\times \frac{d}{c}

    What do you get?
    Follow Math Help Forum on Facebook and Google+
« heights and distances | Smallest angle of right-triangle. »

Similar Math Help Forum Discussions

  1. Prove that
    Posted in the Number Theory Forum
    Replies: 3
    Last Post: May 21st 2010, 05:48 AM
  2. Prove n^2<= ......
    Posted in the Advanced Algebra Forum
    Replies: 12
    Last Post: November 17th 2009, 05:52 AM
  3. prove that if sequence (an) converges, use def of limit of sequence to prove...
    Posted in the Calculus Forum
    Replies: 2
    Last Post: August 28th 2009, 02:59 AM
  4. prove that
    Posted in the Algebra Forum
    Replies: 4
    Last Post: September 7th 2008, 05:14 PM
  5. prove
    Posted in the Advanced Algebra Forum
    Replies: 1
    Last Post: September 7th 2008, 01:45 PM

Search Tags


/mathhelpforum @mathhelpforum