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Home > PC3 > Chapter 3 > Lesson 3.1.1 > Problem 3-14

3-14.

State all values of that satisfy each of the following equations. Sketching a unit circle may help. 

  1. Draw a unit circle. In which quadrants is sine negative?

  1. 1. What special reference angle is this value related to?
    2. In which quadrants is cosine positive?

  1. Since sine is related to the -value of the coordinates of the unit circle, where on the unit circle is ?