Results 1 to 3 of 3

Math Help - Having some trouble

  1. #1
    Newbie
    Joined
    Dec 2008
    Posts
    7

    Having some trouble

    I couldnt figure this one out...can anyone?

    cos(arcsin3/5 + arccos sqrt3/2)

    Thanks!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by Sinsane View Post
    I couldnt figure this one out...can anyone?

    cos(arcsin3/5 + arccos sqrt3/2)

    Thanks!
    Start by letting \sin^{-1} \frac{3}{5} = \alpha \Rightarrow \sin \alpha = \frac{3}{5} and \cos^{-1} \frac{\sqrt{3}}{2} = \beta \Rightarrow \cos \beta = \frac{\sqrt{3}}{2}.

    Your task is to calculate \cos (\alpha + \beta). Hint: Start by applying the compound angle formula and then make the necessary substitutions.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Dec 2008
    Posts
    7
    Thank you..I finally figured it out before you said something..but I appreciate the help. But its always good to make sure something is right haha.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Car trouble
    Posted in the Advanced Applied Math Forum
    Replies: 1
    Last Post: November 26th 2008, 02:53 PM
  2. So I'm having some trouble...
    Posted in the Calculus Forum
    Replies: 44
    Last Post: August 4th 2008, 10:03 PM
  3. im having trouble with this one.
    Posted in the Calculus Forum
    Replies: 2
    Last Post: April 4th 2008, 10:15 AM
  4. Replies: 5
    Last Post: April 3rd 2008, 01:19 PM
  5. Im having trouble with these
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: May 13th 2005, 11:43 AM

Search Tags


/mathhelpforum @mathhelpforum