Answer :

Key points to solve the problem:

The idea of distance formula- Distance between two points P(x1,y1) and Q(x2,y2) is given by- PQ =


Coordinates of the triangle and we need to find cos B which can be easily found using cosine formula.

See the figure:

From cosine formula in ΔABC , We have:

cos B =

using distance formula we have:

AB =

BC =

And, AC =

cos B = …ans

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses