in triangle ABC, 4CosACosB is equal to

#Dr KN Modi University, Tonk

401 Views

in triangle ABC, 4CosACosB is equal to

Recommended : Get important details about Dr KN Modi University, Tonk. Download Brochure

kumarsarvksha1 13th Jul, 2020

Answer

Answer Later

Report

Answer (1)

Nikhitha Sai 22nd Aug, 2020

In a triangle ABC cos(A+B)= cosAcosB-sinAsinB. cos(A-B)= cosAcosB+sinAsinB.

there by, by adding these two and multiplying the result by 2 times you get the desired answer. 4cosAcosB = 2[cos(A+B) + cos (A-B)]. This can also be done by interchanging the signs and the answer will remain the same.

Like Share

Compare Colleges

College Comparison based on Courses, Placement, Rank, Fee

Compare Now

Know More About

Dr KN Modi University, Tonk

Admissions Courses & Fees Placements Reviews

Shortlist

Related Questions

set AB and CDC bisect each other at o (1) State the three pairs of equal parts into two triangles ABC and Bod (2) which of the following statements are teue? (a) triangle a OC is equal to triangle DOB (b)Triangle a OC is equal to triangle BOD

109 Views

If AD and PM ARE MEDIANS OF TRIANGLE ABC AND TRIANGLE PQR RESPECTIVELY WHERE TRIANGLE ABC ~ PQR PROOF AB /PQ= AD/ PM

227 Views

In triangle ABC ,if A:B:C=5:1:6 then a:b:c is

2016 Views

given triangle ABC angle B=90find the value of Ac2

151 Views

What is the area of the right angled triangle ABC, the right angle at point B ?

10 Views

Applications for Admissions are open.

Amity University | B.Sc Admis...

Apply

Ranked amongst top 3% universities globally (QS Rankings)

Sanskaram University M.design...

Apply

100+ Industry collaborations | 10+ Years of legacy

Graphic Era (Deemed to be Uni...

Apply

NAAC A+ Grade | Among top 100 universities of India (NIRF 2024) | 40 crore+ scholarships distributed

Amity University B.Pharma Adm...

Apply

Ranked amongst top 3% universities globally (QS Rankings)

JSS University Noida B.Pharma...

Apply

170+ Recruiters Including Samsung, Zomato, LG, Adobe and many more | Highest CTC 47 LPA

MAHE Manipal M.Tech 2025

Apply

NAAC A++ Accredited | Accorded institution of Eminence by Govt. of India | NIRF Rank #4

View All Application Forms

Trending Articles/News

Download the Careers360 App on your Android phone

Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile

150M+ Students

30,000+ Colleges

500+ Exams

1500+ E-books