if |a-b| = |a| = |b| then, what is the angle between a and b?
Akanksha , 4 Years ago
Grade 11
Vectors> if |a-b| = |a| = |b| then, what is the an...
2 Answers
Saurabh Koranglekar
Last Activity: 4 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
Last Activity: 4 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
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