Results 1 to 3 of 3

Math Help - urgent help needed! simplifying expressions...

  1. #1
    Newbie
    Joined
    Oct 2008
    Posts
    2

    urgent help needed! simplifying expressions...

    HELP! I'm in Math 12 and have a unit exam soon; the questions on my review all seem to be ones I don't have in my notes and can't understand. A couple I've been struggling with for an hour. Can anyone explain how to do these?

    1. sec(-1)-sec(-x)sin*squared*x

    So far, I got to:

    =sec-1+secxsin*squared*x

    =___1____ -1 + __1sin*squared*x__
    cosx ************* cosx
    =___1___ - __sin*squared*x__
    cosx ************* cosx
    = __1-cos*squared*x__
    cosx

    ...and now I'm stuck! What went wrong?

    2. __cos*squared*x__
    cot*squared*x
    =___-cos*squared*x__
    cos *squared*x
    = 1

    ...and, um, that's it. Thx!!!
    Last edited by Laura Vinnedge; October 8th 2008 at 08:06 PM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Apr 2008
    Posts
    1,092
    First, let me make sure I understand the problems.

    Is (1) \sec (-1) + \sec x \sin^2 x?

    Is (2) \frac{\cos^2 x}{\cot^2 x}?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Oct 2008
    Posts
    2
    Hi there!

    Um, sort of... 1. sec(-x)-sec(-x)sin*squared*x
    2. cos*squared*(-x)
    over
    cot*squared*x

    (sorry, havn't figured out how to get a square in there yet)

    What's going on with thoses pesky brackets? How do they work into the equation properly?

    THX!!
    Laura
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Simplifying Expressions
    Posted in the Algebra Forum
    Replies: 1
    Last Post: September 21st 2011, 05:30 PM
  2. Simplifying expressions
    Posted in the Calculus Forum
    Replies: 10
    Last Post: November 10th 2009, 10:41 AM
  3. Replies: 2
    Last Post: September 29th 2008, 11:02 AM
  4. Trig Functions...Simplifying..urgent help needed
    Posted in the Trigonometry Forum
    Replies: 12
    Last Post: November 29th 2007, 09:17 PM
  5. Simplifying expressions
    Posted in the Algebra Forum
    Replies: 4
    Last Post: September 19th 2007, 05:41 AM

Search Tags


/mathhelpforum @mathhelpforum