1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Grade 12 trigonometry

  1. Apr 23, 2009 #1
    1. The problem statement, all variables and given/known data

    Solve the following equation:

    (2sinx-1)(tanx-1) = 0

    The answers are listed as :

    pi/6, 5pi/6, pi/4, 54/4

    2. Relevant equations

    I'm told the unit circle is used.

    3. The attempt at a solution

    I'm attempting to learn this from dijointed class notes for a class I missed....

    I iunderstand I need to use each bracket by itself, make rotations around the unit circle and find a certain value and use the x value...problemis, I have no idea how to get started. Could anyone shed some light on this frustrating topic?
  2. jcsd
  3. Apr 23, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper

    Hi cybernerd! :smile:
    Yes, either (2sinx-1) = 0 or (tanx-1) = 0, so roots of either will do. :smile:
    Sorry, I've no idea what that means in this context …

    surely you just find the principal solution, and then use the ordinary ±180º equations? :confused:
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Grade 12 trigonometry