Results 1 to 4 of 4
Like Tree1Likes
  • 1 Post By integral95

Thread: 2U Trig Q?? :O

  1. #1
    Cadet
    Join Date
    Dec 2016
    HSC
    2018
    Gender
    Female
    Posts
    39
    Rep Power
    2

    2U Trig Q?? :O

    I got this off a 2U school internal exam (Gosford High) and I'm super confused as to why the answer is C, 5 solutions. What do you guys think? I got B, 4 solutions, so if anyone could explain I'd appreciate it
    Attached Images Attached Images
    HSC 2018

    English AdvancedMaths Extension 1Legal StudiesChemistryBiology

  2. #2
    Senior Member integral95's Avatar
    Join Date
    Dec 2012
    HSC
    2013
    Gender
    Male
    Posts
    713
    Rep Power
    5

    Re: 2U Trig Q?? :O

    You have 2 equations





    The sine equation only has one solution, the cos equation has 4 solutions between 0 and 2pi
    A Leaf likes this.
    “Smart people learn from their mistakes. But the real sharp ones learn from the mistakes of others.”
    ― Brandon Mull

  3. #3
    Cadet
    Join Date
    Dec 2016
    HSC
    2018
    Gender
    Female
    Posts
    39
    Rep Power
    2

    Re: 2U Trig Q?? :O

    ooooh! ok thanks - I didn't realise the period was pi not 2pi
    ps. woah fast response haha
    HSC 2018

    English AdvancedMaths Extension 1Legal StudiesChemistryBiology

  4. #4
    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
    142
    Rep Power
    1

    Re: 2U Trig Q?? :O


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
  •