Understand the problem

Cauchy Schwarz Inequality is a powerful tool in Algebra. It was beautiful geometric implications as well. Watch the video and solve the tutorial problems to delve deep into the idea.

Tutorial Problems!

1. Look at the expression \( \sqrt{x_1^2 + y_1^2} \times \sqrt {x_2^2 + y_2^2} \geq (x_1 x_2 + y_1 y_2 ) \)

Can you simply square both sides and prove this ?

2. Show that if A, B are any two points in the plane and O is the origin then cosine of the angle AOB is the ratio of $$ \frac{\text{dot product of the coordinates}} {\text{product of their distances from origin}} $$

Now watch the discussion video

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