Results 1 to 3 of 3

Math Help - cos (180 - theta) = 8

  1. #1
    Newbie
    Joined
    Jan 2010
    From
    England
    Posts
    13

    cos (180 - theta) = 8

    hello,

    I'm working on a question involving resolving forces in equilibrium.

    I don't know if I've been doing it right, but I've ended up with:

    cos (180 - theta) = 8


    Theta is an angle that I need to find.

    Is there any way of manipulating the above in order to find theta?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member
    Joined
    Nov 2009
    Posts
    263
    Quote Originally Posted by protractor View Post
    hello,

    I'm working on a question involving resolving forces in equilibrium.

    I don't know if I've been doing it right, but I've ended up with:

    cos (180 - theta) = 8


    Theta is an angle that I need to find.

    Is there any way of manipulating the above in order to find theta?
    maximum of \cos(180 - \theta) is 1, so there is no way \cos(180 - \theta) = 8
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jan 2010
    From
    England
    Posts
    13

    thanks

    Quote Originally Posted by dedust View Post
    maximum of \cos(180 - \theta) is 1, so there is no way \cos(180 - \theta) = 8
    Thanks for that useful information Dedust, I can definitely abandon that route then! I've actually realised now that I can actually tackle the question using good old Pythagoras, so simple, yet so useful!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 0
    Last Post: April 29th 2010, 10:24 AM
  2. Replies: 2
    Last Post: March 29th 2010, 07:38 AM
  3. Replies: 3
    Last Post: February 6th 2009, 04:19 PM
  4. Replies: 1
    Last Post: January 23rd 2009, 10:53 AM
  5. Solve sin4(theta) = cos2(theta)
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: December 8th 2008, 11:23 AM

Search Tags


/mathhelpforum @mathhelpforum