azeeb008... , asked a question
Subject: Math , asked on 16/12/10

using vectors show that the angle in a semicircle is a right angle


Sunanta Achoibam , Meritnation Expert added an answer, on 20/12/10

Here is the answer to your question.
Let O (0, 0) be the centre of a semicircle of radius a.
The coordinated of any point P on the circle can be written as P (a cos q , a sin q ) where q is the angle formed by OP with positive direction of x-axis.
This, means that angle between PA and PB is 90°.

This conversation is already closed by Expert

  • Was this answer helpful?
  • 9
70% users found this answer helpful.
View Full Answer

What are you looking for?