Results 1 to 4 of 4
Like Tree1Likes
  • 1 Post By fan96

Thread: Trig equations

  1. #1
    Junior Member
    Join Date
    Dec 2016
    HSC
    N/A
    Gender
    Female
    Posts
    179
    Rep Power
    2

    Trig equations

    Solve

    2 cos x = 1-1/2x

  2. #2
    Junior Member HeroWise's Avatar
    Join Date
    Dec 2017
    HSC
    N/A
    Gender
    Male
    Location
    01001110 01100101 01110111 00100000 01010011 01101111 01110101 01110100 01101000 00100000 01010111 01100001 01101100 01100101 01110011
    Posts
    153
    Rep Power
    1

    Re: Trig equations

    What do they want you to solve for ?

    Cant you just make x the subject? please elaborate a bit more so we can help you

  3. #3
    Junior Member
    Join Date
    Dec 2016
    HSC
    N/A
    Gender
    Female
    Posts
    179
    Rep Power
    2

    Re: Trig equations

    It's says prove algebraically that if n is a solution of the equation in part c (which is the above equation) then n is greater than and equal to -2 but less than and equal 6

  4. #4
    617 pages fan96's Avatar
    Join Date
    May 2017
    HSC
    2018
    Gender
    Male
    Location
    NSW
    Posts
    300
    Rep Power
    1

    Re: Trig equations

    The wording hints that you're expected to provide an answer without solving the equation. Solving the equation seems rather hard. I can't think of any ways to express in terms of without losing the on the RHS. Wolfram Alpha also has trouble providing exact answers to it.

    Although the question asks for an algebraic proof, visualising the problem with a graph really helps in understanding it and devising a solution.





    Clearly , therefore:

    Last edited by fan96; 28 Jan 2018 at 2:11 AM.
    darkk_blu likes this.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •