Question

ab is chord of circle abc find cosa from the figure ​

Answer 1

Answer:

Here is the answer =>

Step-by-step explanation:

As AB is the diameter, so ΔABC lies in the semicircle. So angle C=90°(As angle in a semicircle is always 90°).

Therefore AB is the hypotenuse of ΔABC.

Pythagoras Theorem=>

h^2=b^2+a^2

AB^2=3^2+2^2

=9+4

=13cm

So AB=√13cm.

So CosA=B/H

=2/√13

So CosA is 2/√13 which is the required answer.

HOPE IT HELPS.