Unit 1 - Objective 1
Quick Review

There are six possible ratios of two sides of a triangle. The ratios are functions of and are trigonometric functions.


The six trigonometric functions are defined as:


The values of x and y may be positive, negative, or zero, but r is always positive.


Example 1

Given the point (-8,15) on the terminal side of an angle , find the six trigonometric functions of .







Example 2

Given the point (3,-5) on the terminal side of an angle , find the six trigonometric functions of .






(csc should be negative)


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