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Home > PC3 > Chapter 6 > Lesson 6.1.3 > Problem 6-58

6-58.

Below are two of the special angles that are used in the unit circle. Identify the radian measure for each angle shown. Then state the sine, cosine, and tangent of the angle.  

  1. Circle with a central angle, from the negative, x axis, to a point in second quadrant, about 2 thirds of the way between, negative x axis, & positive y axis, with curved arrow pointing counter clockwise, on central angle from positive x axis, circling the entire circle once, & ending at the radius in third quadrant.

  1. Circle with a central angle, from the negative, x axis, to a point in third quadrant, about a third of the way between, negative x axis, & negative y axis, with curved arrow pointing clockwise on central angle from positive x axis, to radius in third quadrant.

Divide each circle into equal sectors and count them.
Remember that half of a circle is equivalent to radians.

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