Evaluate Simple Trigonometric Expressions

Example 1


Example 1: Question

Solution

Since the circle has a circumference of 2π, and since the one revolution about the unit circle yields a central angle of 360°, solve the following proportions

Example 1: Solution

Example 1: Answer
Dotted Line

Example 2


Evaluate sin( -945� )


Solution

Since the circle has a circumference of 2π, and since the one revolution about the unit circle yields a central angle of 360°, solve the following proportions

Example 2: Solution

Example 2: Answer