wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

In ABC, if (a+b+c)(a-b+c)=3ac, then
[AMU 1996]


A

B=60o

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B

B=30o

No worries! We‘ve got your back. Try BYJU‘S free classes today!
C

C=60o

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

A+C=90o

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A

B=60o


(a+c)2b2=3ac a2+c2b2=ac
But cos B=a2+c2b22ac=12B=π3.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Cosine Rule
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon