
CBSE Important Questions›

CBSE Previous Year Question Papers›
 CBSE Previous Year Question Papers
 CBSE Previous Year Question Papers Class 12
 CBSE Previous Year Question Papers Class 10

CBSE Revision Notes›

CBSE Syllabus›

CBSE Extra Questions›

CBSE Sample Papers›
 CBSE Sample Papers
 CBSE Sample Question Papers For Class 5
 CBSE Sample Question Papers For Class 4
 CBSE Sample Question Papers For Class 3
 CBSE Sample Question Papers For Class 2
 CBSE Sample Question Papers For Class 1
 CBSE Sample Question Papers For Class 12
 CBSE Sample Question Papers For Class 11
 CBSE Sample Question Papers For Class 10
 CBSE Sample Question Papers For Class 9
 CBSE Sample Question Papers For Class 8
 CBSE Sample Question Papers For Class 7
 CBSE Sample Question Papers For Class 6

ISC & ICSE Syllabus›

ICSE Question Paper›
 ICSE Question Paper
 ISC Class 12 Question Paper
 ICSE Class 10 Question Paper

ICSE Sample Question Papers›
 ICSE Sample Question Papers
 ISC Sample Question Papers For Class 12
 ISC Sample Question Papers For Class 11
 ICSE Sample Question Papers For Class 10
 ICSE Sample Question Papers For Class 9
 ICSE Sample Question Papers For Class 8
 ICSE Sample Question Papers For Class 7
 ICSE Sample Question Papers For Class 6

ICSE Revision Notes›
 ICSE Revision Notes
 ICSE Class 9 Revision Notes
 ICSE Class 10 Revision Notes

ICSE Important Questions›

Maharashtra board›

RajasthanBoard›
 RajasthanBoard

Andhrapradesh Board›
 Andhrapradesh Board
 AP Board Sample Question Paper
 AP Board syllabus
 AP Board Previous Year Question Paper

Telangana Board›

Tamilnadu Board›

NCERT Solutions Class 12›
 NCERT Solutions Class 12
 NCERT Solutions Class 12 Economics
 NCERT Solutions Class 12 English
 NCERT Solutions Class 12 Hindi
 NCERT Solutions Class 12 Maths
 NCERT Solutions Class 12 Physics
 NCERT Solutions Class 12 Accountancy
 NCERT Solutions Class 12 Biology
 NCERT Solutions Class 12 Chemistry
 NCERT Solutions Class 12 Commerce

NCERT Solutions Class 10›

NCERT Solutions Class 11›
 NCERT Solutions Class 11
 NCERT Solutions Class 11 Statistics
 NCERT Solutions Class 11 Accountancy
 NCERT Solutions Class 11 Biology
 NCERT Solutions Class 11 Chemistry
 NCERT Solutions Class 11 Commerce
 NCERT Solutions Class 11 English
 NCERT Solutions Class 11 Hindi
 NCERT Solutions Class 11 Maths
 NCERT Solutions Class 11 Physics

NCERT Solutions Class 9›

NCERT Solutions Class 8›

NCERT Solutions Class 7›

NCERT Solutions Class 6›

NCERT Solutions Class 5›
 NCERT Solutions Class 5
 NCERT Solutions Class 5 EVS
 NCERT Solutions Class 5 English
 NCERT Solutions Class 5 Maths

NCERT Solutions Class 4›

NCERT Solutions Class 3›

NCERT Solutions Class 2›
 NCERT Solutions Class 2
 NCERT Solutions Class 2 Hindi
 NCERT Solutions Class 2 Maths
 NCERT Solutions Class 2 English

NCERT Solutions Class 1›
 NCERT Solutions Class 1
 NCERT Solutions Class 1 English
 NCERT Solutions Class 1 Hindi
 NCERT Solutions Class 1 Maths

JEE Main Question Papers›

JEE Main Syllabus›
 JEE Main Syllabus
 JEE Main Chemistry Syllabus
 JEE Main Maths Syllabus
 JEE Main Physics Syllabus

JEE Main Questions›
 JEE Main Questions
 JEE Main Maths Questions
 JEE Main Physics Questions
 JEE Main Chemistry Questions

JEE Main Mock Test›
 JEE Main Mock Test

JEE Main Revision Notes›
 JEE Main Revision Notes

JEE Main Sample Papers›
 JEE Main Sample Papers

JEE Advanced Question Papers›

JEE Advanced Syllabus›
 JEE Advanced Syllabus

JEE Advanced Mock Test›
 JEE Advanced Mock Test

JEE Advanced Questions›
 JEE Advanced Questions
 JEE Advanced Chemistry Questions
 JEE Advanced Maths Questions
 JEE Advanced Physics Questions

JEE Advanced Sample Papers›
 JEE Advanced Sample Papers

NEET Eligibility Criteria›
 NEET Eligibility Criteria

NEET Question Papers›

NEET Sample Papers›
 NEET Sample Papers

NEET Syllabus›

NEET Mock Test›
 NEET Mock Test

NCERT Books Class 9›
 NCERT Books Class 9

NCERT Books Class 8›
 NCERT Books Class 8

NCERT Books Class 7›
 NCERT Books Class 7

NCERT Books Class 6›
 NCERT Books Class 6

NCERT Books Class 5›
 NCERT Books Class 5

NCERT Books Class 4›
 NCERT Books Class 4

NCERT Books Class 3›
 NCERT Books Class 3

NCERT Books Class 2›
 NCERT Books Class 2

NCERT Books Class 1›
 NCERT Books Class 1

NCERT Books Class 12›
 NCERT Books Class 12

NCERT Books Class 11›
 NCERT Books Class 11

NCERT Books Class 10›
 NCERT Books Class 10

Chemistry Full Forms›
 Chemistry Full Forms

Biology Full Forms›
 Biology Full Forms

Physics Full Forms›
 Physics Full Forms

Educational Full Form›
 Educational Full Form

Examination Full Forms›
 Examination Full Forms

Algebra Formulas›
 Algebra Formulas

Chemistry Formulas›
 Chemistry Formulas

Geometry Formulas›
 Geometry Formulas

Math Formulas›
 Math Formulas

Physics Formulas›
 Physics Formulas

Trigonometry Formulas›
 Trigonometry Formulas

CUET Admit Card›
 CUET Admit Card

CUET Application Form›
 CUET Application Form

CUET Counselling›
 CUET Counselling

CUET Cutoff›
 CUET Cutoff

CUET Previous Year Question Papers›
 CUET Previous Year Question Papers

CUET Results›
 CUET Results

CUET Sample Papers›
 CUET Sample Papers

CUET Syllabus›
 CUET Syllabus

CUET Eligibility Criteria›
 CUET Eligibility Criteria

CUET Exam Centers›
 CUET Exam Centers

CUET Exam Dates›
 CUET Exam Dates

CUET Exam Pattern›
 CUET Exam Pattern
Law of Cosines Formula
The Law Of Cosines Formula is crucial for solving problems. In Mathematics, the law of cosines is a crucial topic. To score well in the examinations, it is crucial to practice law of cosines problems. Aside from the law of cosines, all other topics are equally crucial. Students must pay attention to them as well. Topics related to the Law Of Cosines Formula are also very important in higher education. Understanding the fundamentals in school is crucial for understanding more complex ideas later on. A consistent revision of the law of cosines is required. Students are expected to go through all the chapters in order to prepare well for the Mathematics examination. Questions can appear from every chapter in the final examination. The Extramarks learning platform can assist students to score higher marks in the Mathematics examination.
Quick Links
ToggleThe Pythagorean theorem, also known as Pythagoras’ theorem, is a basic relationship between a right triangle’s three sides in Euclidean geometry. According to this rule, the areas of the squares on the other two sides add up to the area of the square whose side is the hypotenuse, or the side across from the right angle. This theorem can be expressed as the Pythagorean equation, which is an equation relating the lengths of the sides a, b, and the hypotenuse c.
a2+b2= c2.
Pythagoras, a Greek philosopher who was born around 570 BC, is remembered by the theorem’s name. The theorem has likely been proved the most times of any mathematical theorem using a variety of techniques. The proofs are numerous, some of which go back thousands of years, and include both geometric and algebraic proofs.
The Pythagorean relation states that the squared distance between two points equals the sum of squares of the difference in each coordinate between the points. It is satisfied when Euclidean space is represented by a Cartesian coordinate system in analytic geometry.
There are several ways to generalise the theorem, including higherdimensional spaces, noneuclidean spaces, objects other than right triangles, and even objects that are not triangles at all but ndimensional solids. The Pythagorean theorem has garnered interest outside of Mathematics as a representation of mathematical mystique, power, or obscurity; there are numerous references to it in popular works of fiction, plays, musicals, songs, stamps, and cartoons.
All of the topics are thoroughly covered in the Mathematics textbook published by NCERT. While preparing for the Mathematics exam, students must continue to consult their textbook. Its entire list of questions is crucial for understanding the chapters’ topics. From the standpoint of the exam, the questions in the textbook are significant. Students are required to periodically evaluate how well they are doing on their examinations. They can accomplish this by solving questions from Mathematics sample papers. They can easily download Extramarks’ Mathematics sample papers. Extramarks has helped students improve their exam scores ever since it was founded in 2007. Students from more than 10,000 Indian schools use the Extramarks learning platform to improve their grades in academic examinations. Students in all classes can easily access study materials from Extramarks. On the Extramarks learning platform, students will be able to quickly and simply access study materials. All of the study materials are periodically checked for errors. The Extramarks study materials are all incredibly trustworthy and authentic, so students should use them. It is advised that they learn each theory in the chapters in order to be prepared for the examination. Additionally, students need to thoroughly revise them. If the theoretical concepts are understood, they will be able to answer questions effectively. There are numerous online learning platforms from which students can select. It is crucial to pick the best learning platform and study materials available. Every chapter of a subject can be thoroughly learned with the help of Extramarks. It aids in the gradual development of concepts. To aid students in understanding the concepts, Extramarks employs a range of media. Students must develop concepts one at a time in order to solve complex problems in an efficient manner. They will receive thorough guidance from subjectmatter experts on Extramarks. The Extramarks live classes are important for enhancing the understanding of each subject. Teachers clearly explain each subject so that students can remember it for a very long time.
What is Law of Cosines?
The cosine of one of a triangle’s angles and the lengths of its sides are related by the Law Of Cosines Formula. We are now able to calculate angles and distances that are impossible to measure without the aid of trigonometry. The Law Of Cosines Formula is used to compute the third side of a triangle when the first two sides and the enclosed angle are known. It is also useful to compute the angles of a triangle when all three sides are known. The link between a triangle’s side lengths and the cosine of its angles is established with the aid of the law of cosine. The right trianglespecific Pythagoras theorem is generalised by the cosine law in trigonometry.
According to the law of cosine, the square of any one side of a triangle is equal to the difference between the sum of the squares of the other two sides and double the product of the other two sides and the cosine angle included between them. Let A, B, and C represent the triangle’s three angles while a, b, and c represent the lengths of the triangle’s three sides. So, according to the law of cosine, a2 = b2 + c2 2bc.cosA. The Pythagorean theorem is generalised by the law of cosines in trigonometry, as was already mentioned. To understand the law of cosines, students need to recall the topics covered in Pythagoras theorem. Students having difficulties in solving any question regarding the law of cosines should take assistance from the Extramarks learning platform. Students are advised to keep revising the important formulas. All the questions regarding a topic can be practised by taking assistance from the NCERT solutions. Students having difficulties in solving questions should keep referring to the NCERT solutions. Practising questions with the Law of Cosines Formula will help students to get a clear idea of the theoretical parts. Students need to get a thorough understanding of topics before solving questions.
A deeper understanding of the law of cosines is necessary. Each of the points discussed in the law of cosines needs to be revised again and again by students. It is crucial for students to learn better problemsolving skills to solve questions related to the law of cosines topic. The NCERT solutions provided by Extramarks are very significant for learning better problemsolving skills. Students should keep referring to the NCERT solutions while practising exercises.
Law of Cosines: Definition
Students should learn the law of cosines definition. They must also make revisions to it. Students will perform better in the Mathematics exam by reviewing definitions. Understanding the derivations of the Law Of Cosines Formula requires knowledge of theories related to the topic. After studying the Law Of Cosines Formula derivations, all the questions become simple to practice. Law Of Cosines Formula topic can be challenging, and practising questions might be intimidating. It is suggested that students use the Extramarks website and mobile application to help them with challenging Law Of Cosines Formula questions.
Law of Cosines Formula
Each type of questions should be periodically practised. Consistent practice greatly improves time management. A certain amount of time is allotted for answering the Mathematics question paper. For better time management, it is essential to practice answering questions in timed situations. It is necessary to practice answering every difficult question several times.
It is necessary to continuously practice answering questions that can be answered using the Laws Of Cosines Formula. The method must be used correctly by the students. When answering questions about the law of cosines topic, the Laws Of Cosines Formula is crucial.
Proof of Law of Cosines
It is important to focus on the proof of the Law Of Cosines Formula. Students should pay attention to all the steps given in the proof of the Law Of Cosines Formula. Students having problems in understanding the proof of the Law Of Cosines Formula are advised to take help from the Extramarks learning platform. The live lectures of Extramarks are very essential for getting a deeper understanding of the topics. Students will be able to learn each topic of a subject by making use of the live lectures. Expert teachers of each subject conduct these live classes. Students can also ask questions during the classes. The Law Of Cosines Formula is important for getting appropriate solutions to problems. All topics are thoroughly covered in the NCERT Mathematics textbook, which students can read on a regular basis to develop a solid understanding of the topics’ theories. The textbook’s definitions, theories, formulae, examples, and other information are vital to understanding the chapters. They should be revised repeatedly by students. It helps to regularly review formulas and derivations to come up with the right answers to exercise questions.
Examples Using Law of Cosines
Students are required to solve problems with respect to the law of cosines. Solving questions assists students to get a deeper understanding of the theories. Many questions can be difficult to practice. Students are advised to make efforts to solve difficult problems but if they fail, Extramarks can help them. The NCERT solutions available on Extramarks are helpful in solving all the difficult questions related to the law of cosines. The Law Of Cosines Formula will help students to get an exact solution to questions. There are two circumstances where the law of cosines is required:
When the lengths of the first two sides of a nonright triangle and the measurement of the included angle are known, the first form can be used to determine the length of the third side.
When we are given the lengths of all three sides of a nonright triangle and need to determine the measure of any angle, we use the rearranged form. It is best to focus more on what the letters stand for in relation to the side length or angle measures that are to be calculated rather than the letters themselves. Students need to pay attention to details given in the questions to get a proper solution. All the important topics based on the Law Of Cosines Formula are supposed to be revised on a regular basis. Solving questions also help in revision. Students are also encouraged to learn the derivation of the Law Of Cosines Formula.
Practice Questions on Law of Cosines
When practising questions involving the law of cosines, use the Law Of Cosines Formula. It is essential to continue referring to the curriculum as students study for the Mathematics examination. The syllabus is useful for keeping the exam preparation on course. To adequately prepare for the final examination, each chapter listed in the syllabus must be covered. Students will benefit from the NCERT solutions offered by Extramarks as they learn how to successfully use the Law Of Cosines Formula. To learn how to use the Law Of Cosines Formula, students must pay closer attention to solved examples. For a complete review of the ideas, each and every question in the chapters on Mathematics is crucial. It is necessary to learn all the points discussed in the Law Of Cosines Formula. Solving questions will become easy for students if they have a deeper understanding of the Law Of Cosines Formula. Students need to keep referring to all the study materials available to improve their exam preparation. There are new ways to practice questions related to the Law Of Cosines Formula. Students will learn those new methods by taking guidance from the Extramarks teachers.
FAQs (Frequently Asked Questions)
1. What role does the Law Of Cosines Formula play?
For practising exercise questions, it is essential to know the Law Of Cosines Formula. To correctly apply the Law Of Cosines Formula and obtain the necessary answers to questions, students must make use of the NCERT solutions.
2. Where may students find solutions to problems involving the Law Of Cosines Formula?
NCERT solutions are available on the Extramarks website and mobile application, and they can be used to answer questions about the Law Of Cosines Formula. They will gain the ability to provide accurate answers to questions involving the Law Of Cosines Formula by referring to the NCERT solutions. Students can enhance their learning experience by taking help from the Extramarks learning platform.