The following activity sheets will give your students practice in working with many different cofunctions.

#### Cofunctions are two trigonometric functions whose complementary input angles produce equal output. When we look at the actual math behind this, remember that we are working with co-functions, so if you are working with sine; you will also be working with cosine. In this section you will be asked to determine the cofunction, simplify operations, or evaluate a small system. Students should already be familiar with sine, cosine, tangent, cotangent, secant, and cosecant.

What Are Cofunctions? A function 'f' is the cofunction of a function 'g'. So, f = g whenever A and B are complementary angles. This description naturally applies to trigonometric functions. The prefix "co-" can originate already in Edmund Gunter's Canon triangulorum. What are Cofunctions in trigonometry? The cofunction identities show the association amongst cosine, sine, cotangent, Tangent, cosecant, and secant. The worth of a trigonometric function of an angle equals the value of the cofunction of the complement. A recollection from geometry that an accompaniment is apparent as two angles whose sum is 90° These worksheets explain how to solve for cofunctions and how to simplify expressions containing cofunctions. These worksheets will help you learn how to simplify and find the values of different trigonometric functions.

# Print Cofunction Worksheets

## Co Functions Lesson

This worksheet explains how to solve for cofunctions and how to simplify expressions containing cofunctions. A sample problem is solved, and two practice problems are provided.

## Co Functions Worksheet

Students will solve for the co function, or simplify the expression, as indicated. Ten problems are provided.

## Co Functions Practice

Students will answer each problem by solving for the co function or simplifying the expression. Ten problems are provided.

## Co Functions Review and Practice

This worksheet explains how solve for the co function. A sample problem is solved, and six practice problems are provided.

## Co Functions Quiz

Students will demonstrate their proficiency solving for the co function and simplifying expressions using co functions. Ten problems are provided.

## Co Functions Skills Check

Students will solve for the co functions. Three problems are provided, and space is included for students to copy the correct answer when given.