Results 1 to 5 of 5

Math Help - Evaluating This Trig Function

  1. #1
    Newbie
    Joined
    Mar 2006
    Posts
    17

    Evaluating This Trig Function

    Hi, I was wondering if anyone could help me evaluate this trig function

    sin(Cos^-1(5/13) + Sin^-1(3/5)) =
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Newbie
    Joined
    Mar 2006
    Posts
    17
    would this be working it to the right way?

    using the Sum and Differences forumla of
    sin(x+y)=sinXcosY+cosXsinY

    Sin(Cos^-1(5/13))Cos(Sin^-1)) + Cos(Cos^-1(5/13))Sin(Sin^-1(3/5))
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,894
    Thanks
    326
    Awards
    1
    Quote Originally Posted by drewms64
    would this be working it to the right way?

    using the Sum and Differences forumla of
    sin(x+y)=sinXcosY+cosXsinY

    Sin(Cos^-1(5/13))Cos(Sin^-1)) + Cos(Cos^-1(5/13))Sin(Sin^-1(3/5))
    Looks like a good start to me!

    -Dan
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    Joined
    Oct 2005
    From
    Earth
    Posts
    1,599
    Draw out your right triangle and work from there. The first term can be found easily this way.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Mar 2006
    Posts
    17
    I was able to use the right triangle way and get

    Code:
    SIN(COS^-1(5/13))COS(SIN^-1(3/5)) + (5/13)(3/5)
    
    (12/13)(4/5) + (5/13)(3/5)
    
    (48/65) + (15/65) = 63/65
    thanks for the help
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. evaluating a trig limit
    Posted in the Calculus Forum
    Replies: 3
    Last Post: October 10th 2011, 05:04 PM
  2. Replies: 5
    Last Post: April 26th 2011, 05:08 AM
  3. Evaluating inverse trig function
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: April 23rd 2009, 09:07 AM
  4. Evaluating trig function
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: March 20th 2009, 03:51 PM
  5. Need help!....again. Evaluating a trig function
    Posted in the Trigonometry Forum
    Replies: 5
    Last Post: April 6th 2008, 04:03 PM

Search Tags


/mathhelpforum @mathhelpforum