Question

A point P(a, b) is rotated about origin through 90° in anticlockwise direction to get a point Q and then
reflected in y-axis to get a point (3, 4). Find the original point P.​

Answer 1

Answer:

When you reflect a point in the origin, both the x-coordinate and the y-coordinate are negated (their signs are changed). In a point reflection in the origin, the image of the point (x,y) is the point (-x,-y).