A circle with radius 1 and cetered at the origin is called unit circle.

Equation of the unit circle is in the form $\"\"$ .

The coordinates of every point on the unit circle is in the form $\"\"$ .

Point $\"\"$ corresponding to the real number $\"\"$ is

$\"\"$

Point $\"\"$

$\"\"$

Now find

$\"\"$

So, Point $\"\"$ and $\"\"$ , $\"\"$ , $\"\"$ ,