Question

Find the coordinates of the point on a circle with radius 15 corresponding to an angle of 225o .

Answer 1

x = (-15√2)/2

y = (-15√2)/2

Explanation:

x = r cos Θ

y = r sin Θ

x = 15 × cos 225° = 15 × (-√2)/2 = (-15√2)/2

y = 15 × sin 225° = 15 × (-√2)/2 = (-15√2)/2