# Cofunction Formulas

## Cofunction Identities

The science of structural relationship and order, known as mathematics, is a rational discipline that developed from the rudimentary practices of counting, measuring, and describing the shapes of objects. Additionally, logical thinking and quantitative calculation are covered. As a result, the term “mathematics” merely refers to the study of mathematics. Theories in mathematics aid students in comprehending and resolving a wide range of issues in both academic and practical contexts. Solving mathematical puzzles is perhaps the best brain exercise.

As mathematics has evolved, its subject matter has been idealized and abstracted more and more. Mathematicians from many civilizations around the world have researched the topic for ages. The BC century honours Archimedes (287–212 BC) as the founder of mathematics. He created formulas to determine the volume and surface area of solids. The Father of Indian Mathematics is a man by the name of Aryabhatt, who was born in 476 CE.

Since the 17th century, mathematics has been an essential component of the physical sciences and technology. More recently, it has been predicted that mathematics will play a comparable role in the quantitative aspects of the life sciences.

The Pythagoreans were the first people to study mathematics as a “demonstrative science” in the sixth century BC. The term “mathematics” derives from the Greek word “mathema,” which means “stuff of education.”

Another mathematician named Euclid created axioms, theorems, proofs, and postulates. Modern mathematics continues to make extensive use of these ideas.

Functions are a very important topic in Mathematics. A function f is a Cofunction Formulas of a function g if f(A) = g(B) whenever A and B are complementary angles. A mathematical function is said to be a special kind of relation between inputs and outputs, where every input value is connected with exactly one output value by the means of a particular property. The trigonometric functions are one of the most important ones.

Cofunction Formulas Identities is part of Trigonometry. Mathematicians use the subject of study known as trigonometry to employ numerous formulas to solve a wide range of issues. There are countless applications for trigonometry in daily life. Calculating the distance between the moon and the earth and determining the distance between two objects placed far apart but with missing inputs are two of the main applications of trigonometry.

A branch of mathematics known as trigonometry is able to deal with a number of relationships between triangles’ angles and sides. Additionally, they include various perspectives of their pertinent operations. In JEE Main, trigonometry involves employing various trigonometric formulae to solve questions. Trigonometric ratios like the sin, sec, cos, cosec, tan, and cot functions are among the trigonometric ratio difficulties. In addition, they include Pythagorean identities, product identities, etc.

Additional equations are briefly explained, such as those having ratio signs in various quadrants, Cofunction Formulas identities, which are nothing more than shifting angles, half-angle identities, double angle identities, sum and difference identities, etc.

Various applications of Trigonometry :

Trigonometry is often used in everyday life. Here are a few of them:

Trigonometry is used in physics to solve practical difficulties.

There are video games that make use of trigonometry.

Buildings are constructed with it.

It is extensively used in aerospace engineering and is very helpful for determining the heights of structures and mountains.

Importance of Trigonometry:  It is common knowledge that trigonometry is one of the most crucial subjects for the JEE Mains. At least three or four questions must be drawn from this specific chapter, according to the requirements. The students are therefore urged to master it without fail.

## What are Cofunction Identities?

Trigonometric identities known as Cofunction Formulas identities demonstrate the connection between trigonometric functions and complementary angles. Six of these identities can be derived using a right-angled triangle, a triangle’s angle sum property, and formulas for trigonometric ratios. The trigonometric functions sine and cosine, tangent and cotangent, and secant and cosecant are related by the Cofunction Formulas identities. Cofunctions Formulas of each other are the terms used to describe these functions. These identities can also be derived using the sum and difference trigonometric formulae. As an alternative, one can confirm the identities of the Cofunctions Formulas using the sum and difference formulas.

### Cofunction Identities Formula

Trigonometric functions, when used in pairs, have the following connection with their complementary angles:

Functions of sine and cosine

both the tangent and cotangent functions

Functions that are both secant and cosecant

When two angles add up to 90 degrees, they are said to be complementary. Since radians and degrees are the two units used to measure angles, we can express the Cofunction Formulas Identities in terms of these two angles.

### Cofunction Identities Proof

It is very important for students to understand the Cofunction Formulas Identities proof. In Mathematics, when students understand the Mathematical proofs behind various concepts, it becomes easier for them to comprehend the formulas. Studying in this manner makes Mathematics interesting, and it becomes easy to apply Mathematical concepts.

### Verification of Cofunction Identities

Using various formulas of Trigonometry students can verify the six Cofunction Formulas Identities. The formulas used to verify Cofunction Formulas Identities are:

• sin(A – B) = sinA cosB – cosA sinB
• cos(A – B) = cosA cosB + sinA sinB
• tan A = sin A / cos A

These are the most basic formulas in this chapter. If students understand these formulas well, they will be able to understand the rest of the chapter and its concepts well.

### Using Cofunction Identities

The best way to learn Mathematics is to practise a lot of questions. Students must use and apply the concepts of Cofunction Formulas Identities to solve its questions easily.

### Cofunction Identities Examples

Examples are the best way to understand and practise any concept. Therefore, students must read and solve all example questions on Cofunction Formulas Identities. If they face any difficulties in understanding the example questions they can revisit the resources provided by Extramarks. Extramarks solutions will also help students to retain important information like formulas and theorems.

### Cofunction Identities Questions

Students will find answers to all the questions related to Cofunction Formulas Identities on the website and mobile application of Extramarks. Extramarks’ solutions will help them understand the concept better. Students must use the solutions provided by Extramarks as they are written in a step by step manner. With the help of Extramarks resources, it becomes easy for students to revise important concepts. Therefore, they must refer to the resources offered by Extramarks.

### 1. Are Cofunction Formulas Identities important for competitive exams?

Cofunction Formulas Identitiesis very important for competitive exams like JEE as it is part of Trigonometry.

### 2. What are the various resources provided by Extramarks?

Extramarks provides various resources such as NCERT solutions, Revision notes, Past years’ papers solutions for the benefit of students. Students can download all these resources from the website and mobile application of Extramarks.