Q. 85.0( 2 Votes )

# A point P has coo

Answer :

(If a point P has coordinates (x1,y1) in a coordinate system X ′OX ↔ Y′OY, and if O has coordinates (a,b) in another system X_{1}′O_{1}X_{1}↔ Y_{1}′O_{1}Y_{1} with X ′OX || X ′O_{1}X_{1}, then the coordinates of P(say x,y) in the new system X_{1}′O_{1}X_{1}↔ Y_{1}′O_{1}Y_{1} will be x = x1 + a and y = y1 + a)

Here, x = 7, y = 10, x1 = 10, and y1 = 7

⇒ a = x - x1

⇒ a = 7 - 10

⇒ a = -3

And, b = y - y1

⇒ b = 10 -7

⇒ b = 3

⇒ the coordinates of O_{1} in the system X′OX ↔ Y′OY are **(-3, 3).**

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