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Grade 12 trigonometry

  • Thread starter cybernerd
  • Start date
  • #1
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Homework Statement



Solve the following equation:

(2sinx-1)(tanx-1) = 0
0<x<2pi

The answers are listed as :

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

Homework Equations



I'm told the unit circle is used.

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?
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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Hi cybernerd! :smile:
Solve the following equation:

(2sinx-1)(tanx-1) = 0
0<x<2pi

I iunderstand I need to use each bracket by itself
Yes, either (2sinx-1) = 0 or (tanx-1) = 0, so roots of either will do. :smile:
… make rotations around the unit circle and find a certain value and use the x value
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:
 

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