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Home > PC > Chapter 4 > Lesson 4.2.3 > Problem 4-104


Find the exact value of each of the following trig expressions without using a calculator.

  1. Draw a unit circle with reference angle.
    Circle with point in third quadrant, about 1 third below negative x axis, right triangle with hypotenuse from point to center, horizontal leg labeled negative 1 half times square root of 3.

  1. Follow the hint in part (a).

  1. Follow the hint in part (a).

Compute without a calculator