### Home > A2C > Chapter 8 > Lesson 8.1.5 > Problem 8-79

8-79.

Calculate each of the following values. Express your answers exactly and as decimal approximations. Homework Help ✎

Remember that a full circle as 2π radians and a half circle has π radians.

Draw a right triangle and use the special triangle relationship to find the exact value.

Draw a right triangle.

Notice that 60° is your reference angle.

Use the 30°-60°-90° relationship to find the exact value.