1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Trig Help

  1. Jan 23, 2005 #1
    OK, I worked through an assignment wanting me to rewrite formulas. However two problems are driving me crazy.

    sin(x + (pi/6))
    I get (sqrt(3)/2)sinX + (1/2)cosX
    not really too simplified.

    ((1-cos4x)/2) ((1+cos4x)/2)
    (1 + cos8x)(1/16)
    //When I plug numbers in I do not get a valid solution for the original equation so I messed up somewhere.

    Any guidance is appreciated. Thank you for your time and knowledge. Also, congratulations this site has grown a lot since my old days of getting on about everyday. Job got in the way and all.
  2. jcsd
  3. Jan 23, 2005 #2


    User Avatar
    Science Advisor
    Homework Helper

    The first one cannot be simplified indeed...

    The second is
    [tex] \sin^{2}2x\cos^{2}2x [/tex]

    ,or i didn't understant it??

    [tex] \sin 2u=2\sin u\cos u [/tex]

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Trig Help
  1. Trig Help (Replies: 5)

  2. Trig help (Replies: 2)