$\"\"$

The point $\"\"$ is in Quadrant I.

Radius $\"\"$ is $\"\"$ .

In Quadrant II cosine $\"\"$ is negative and the sine of $\"\"$ is positive.

Find the value $\"\"$ and $\"\"$ .

Trigonometric function : $\"\"$ .

$\"\"$

$\"\"$ .

Trigonometric function : $\"\"$ .

$\"\"$

$\"\"$ .

Thus, the coordinates of $\"\"$ are $\"\"$ .

$\"\"$

The coordinates of $\"\"$ are $\"\"$ .