Guest

if |a-b| = |a| = |b| then, what is the angle between a and b?

if |a-b| = |a| = |b| then, what is the angle between a and b?

Grade:11

2 Answers

Saurabh Koranglekar
askIITians Faculty 10336 Points
2 years ago
Dear student

There must be more conditions given, if not

a,b can be zero vectors and angles possible are infinite

But that is trivial, kindly attach the question's complete image

Regards
Akanksha
12 Points
2 years ago
We are given |a-b| = |a| = |b|
 
a-b = sqrt(a^2 + b^2 – 2abcostheta) = a
 
a^2 = a^2 + a^2 – 2a^2costheta
 
2a^2costheta = a^2
 
costheta = ½
 
Hence theta = 60 deg

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

ASK QUESTION

Get your questions answered by the expert for free