Find sum of the co-ordinate of the points obtained on rotating 4-3 through 90- anticlockwise direction about the origin-

The correct option is A 7Rotation of point P(x,y) through 90^∘ (anticlockwise) about origin = P'( y,x). So, the rotation of point P (4, 3) through 90^∘ (anticl ...

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Standard VIII

Mathematics

Representation of Point on the Plane

Find sum of t...

Question

Find sum of the co-ordinate of the points obtained on rotating (4,-3) through $90^{\circ}$ anticlockwise direction about the origin.

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Solution

The correct option is A 7
Rotation of point P(x,y) through $90^{\circ}$ (anticlockwise) about origin = P'(-y,x).
So, the rotation of point P (4,-3) through $90^{\circ}$ (anticlockwise) about origin = P'(3,4).

Sum of the coordinate = (3 + 4) = 7

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Find sum of the co-ordinate of the points obtained on rotating (4,-3) through 90∘ anticlockwise direction about the origin.

The correct option is A 7Rotation of point P(x,y) through 90∘ (anticlockwise) about origin = P'(-y,x). So, the rotation of point P (4,-3) through 90∘ (anticlockwise) about origin = P'(3,4). Sum of the coordinate = (3 + 4) = 7

Find sum of the co-ordinate of the points obtained on rotating (4,-3) through $90^{\circ}$ anticlockwise direction about the origin.

The correct option is A 7
Rotation of point P(x,y) through $90^{\circ}$ (anticlockwise) about origin = P'(-y,x).
So, the rotation of point P (4,-3) through $90^{\circ}$ (anticlockwise) about origin = P'(3,4).

Sum of the coordinate = (3 + 4) = 7