Results 1 to 4 of 4

Math Help - Trigonometry HELP

  1. #1
    Junior Member
    Joined
    Sep 2008
    Posts
    30

    Trigonometry HELP

    I have this problem that I've already figured out, but I just need someone to check if it is right or not. I need to know if the picture I drew is correct as well.

    Here's the problem and drawing:



    The first thing I used was the Pythagorean Theorem to get length c and I got 161.6.

    Then, I found the angle of elevation by finding the cosine the angle in red and got 51.8.

    Is this correct?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by meiyukichan View Post
    I have this problem that I've already figured out, but I just need someone to check if it is right or not. I need to know if the picture I drew is correct as well.

    Here's the problem and drawing:



    The first thing I used was the Pythagorean Theorem to get length c and I got 161.6.

    Then, I found the angle of elevation by finding the cosine the angle in red and got 51.8.

    Is this correct?
    you are correct. but that's overkill!

    we didn't need Pythagoras' theorem. you could have just used the tangent trig ratio right off the bat. you know the height of the triangle (the opposite side to the angle of elevation) and the base of the triangle (the adjacent side to the angle of elevation). tangent = opposite/adjacent
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Sep 2008
    Posts
    30
    Quote Originally Posted by Jhevon View Post
    you are correct. but that's overkill!

    we didn't need Pythagoras' theorem. you could have just used the tangent trig ratio right off the bat. you know the height of the triangle (the opposite side to the angle of elevation) and the base of the triangle (the adjacent side to the angle of elevation). tangent = opposite/adjacent
    oh whoops. i wasn't really paying attention.
    i guess i'll use the shorter way.
    thanks
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Oct 2007
    From
    Sydney, Australia
    Posts
    5

    Thumbs up Angles of Elevation and Depression Problems

    For a great visual explanation of similar examples, check out Mathematics.com.au - Angles Of Elevation && Depression

    The lesson is fully narated as well so is very easy to understand.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Trigonometry to Memorize, and Trigonometry to Derive
    Posted in the Trigonometry Forum
    Replies: 9
    Last Post: August 21st 2013, 01:03 PM
  2. How To Do Trigonometry For This...?
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: January 10th 2009, 06:56 PM
  3. How To Do This Trigonometry
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: January 3rd 2009, 02:55 AM
  4. trigonometry
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: December 31st 2008, 09:06 PM
  5. Trigonometry
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: December 18th 2008, 05:40 PM

Search Tags


/mathhelpforum @mathhelpforum