Results 1 to 3 of 3

Thread: Vectors

  1. #1
    Junior Member
    Joined
    Mar 2009
    Posts
    65

    Vectors

    Not sure what im doing wrong here,



    1.Find the components of the vector with length = 1.00 and angle =10.0 with respect to the x axis as shown.

    i solved for 1cost(10), 1sin(10) but its saying my answer is incorrect..

    2.Find the components of the vector with length = 1.00 and angle =10.0 with respect to the x axis as shown.

    3.Find the components of the vector with length = 1.00 and angle 25.0 as shown.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Grandad's Avatar
    Joined
    Dec 2008
    From
    South Coast of England
    Posts
    2,570
    Thanks
    1
    Hello Juggalomike
    Quote Originally Posted by Juggalomike View Post
    Not sure what im doing wrong here,



    1.Find the components of the vector with length = 1.00 and angle =10.0 with respect to the x axis as shown.

    i solved for 1cost(10), 1sin(10) but its saying my answer is incorrect..
    The components of $\displaystyle \vec{A}$ are
    $\displaystyle a\cos\alpha$ and $\displaystyle a\sin\alpha$
    along $\displaystyle Ox$ and $\displaystyle Oy$ respectively. So that's $\displaystyle \cos10^o=0.9848$ and $\displaystyle \sin10^o = 0.1736$, correct to 4 d.p.

    If the answer you've been given is different from this, then either the answer or the question is wrong!

    2.Find the components of the vector with length = 1.00 and angle =10.0 with respect to the x axis as shown.
    3.Find the components of the vector with length = 1.00 and angle 25.0 as shown.
    In a similar way, the components of $\displaystyle \vec{B}$ along $\displaystyle Ox$ and $\displaystyle Oy$ are:
    $\displaystyle b\cos\beta$ and $\displaystyle b\sin\beta$, respectively
    and the components of $\displaystyle \vec{C}$ are:
    $\displaystyle -c\sin\phi$ and $\displaystyle c\cos\phi$, respectively
    Grandad
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Mar 2009
    Posts
    65
    That is the same answer i got, gonna ask the teacher about it because i believe there may be an error in the system. Thanks
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 3
    Last Post: Nov 15th 2011, 05:10 PM
  2. Replies: 3
    Last Post: Jun 30th 2011, 08:05 PM
  3. Replies: 2
    Last Post: Jun 18th 2011, 10:31 AM
  4. [SOLVED] Vectors: Finding coefficients to scalars with given vectors.
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: Jan 23rd 2011, 12:47 AM
  5. Replies: 4
    Last Post: May 10th 2009, 06:03 PM

Search Tags


/mathhelpforum @mathhelpforum