Results 1 to 4 of 4

Math Help - extra credit

  1. #1
    Newbie
    Joined
    Oct 2008
    Posts
    6

    extra credit

    why does arcsin(2x) + arccos(x) = PI / 6?

    our teacher wants us to show this using identities, not literally finding a solution for (x)
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,957
    Thanks
    1781
    Awards
    1
    Quote Originally Posted by lazyboy292 View Post
    why does arcsin(2x) + arccos(x) = PI / 6?
    our teacher wants us to show this using identities, not literally finding a solution for (x)
    Does your screen name tell you something?
    What have you tried?
    Show some effort on your part!
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Oct 2008
    Posts
    6
    arcsin 2x = PI/6 - arccos x
    2x = sin(PI/6 - arccos x)
    thats all ive gotten so far
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by lazyboy292 View Post
    arcsin 2x = PI/6 - arccos x
    2x = sin(PI/6 - arccos x)
    thats all ive gotten so far
    If this is for extra credit then I think you should be handing in your own work, not the work of others.

    Thread closed.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. could use some help on an extra credit problem
    Posted in the Calculus Forum
    Replies: 1
    Last Post: May 10th 2011, 04:48 PM
  2. Differentials Extra Credit
    Posted in the Differential Equations Forum
    Replies: 2
    Last Post: April 21st 2010, 08:02 PM
  3. Extra-credit problem
    Posted in the Pre-Calculus Forum
    Replies: 5
    Last Post: March 17th 2008, 09:25 PM
  4. extra credit
    Posted in the Calculus Forum
    Replies: 1
    Last Post: March 4th 2008, 07:00 PM
  5. extra credit help
    Posted in the Math Topics Forum
    Replies: 14
    Last Post: December 19th 2007, 04:14 AM

Search Tags


/mathhelpforum @mathhelpforum